 Fine. No issues. Now I'm starting the quiz. Yes, fine. So first question is in front of your students Okay, just know someone has done An aluminium atom has a nucleon number 27 and proton number 13. How many neutrons does this aluminium atom contains? You know what you have only 20 seconds left So the text is still kind of small Okay, answer is B because nucleons Nuclear neutrons are nothing but mass number minus atomic number. Is it clear any doubt? Neutrons are mass number minus atomic number. Mass is 27. Atomic number is 13 27 minus 13 is 14. Moving to next question Giant please mute. Okay, fine Who is this matter? Tell me name. Tell me your name Sir, if you click the metal, sir just click it in the name you got. No, sir you have to click metal. It's already the default name. Yes, it's already the default name. It's into its default name, sir. So, my next question. Next question is this An atom of aluminium contains electron Sir, what is mytrium? Yes, that is one atom. Wait, that's... Yttrium is an element Okay, over So, 42 students are right in this question. We'll see how to do Atoms 19, proton, electron, neutron You know you need to remember that atomic number 20. Atomic number 19 is for potassium You should remember this. So, electron is proton and neutron are 20 If they only give the electron number also you can Guess it right. It is like potassium only Calcium has atomic number 20 Like that. Okay, you are expected to know till atomic number 20 You are expected to know till 20. So, remember till atomic number 20 Okay And it out. Okay, next question Next question Okay Answer is potassium Atomic number 19 is potassium You have one minute for this question Okay Yes, I know the full periodic table But I know you people remember by the song But I don't remember. I don't remember the song. What happened? Sir, it's time in 3 seconds Okay, fine So now, I think it ends up and the result is Most of you have answered it right But many of you are wrong also. Fine So answer for this question is A Not a matter Not a matter means See, 18 electron, 18 proton It is nothing but argon Argon is 18 electron, 18 proton So that is, that's a Fine. Now, if you see 19 proton 19 electron, 19 proton is potassium This is also potassium. 20 is calcium So calcium, potassium, potassium Answer is argon only Any doubt? Any doubt? Fine. I am moving to next question Students, why you... 15 students have answered not just 15 24 and 7, oh my god Almost 50% student have answered it wrong I don't know for what reason Okay, moving to the next question This is the fourth question Which statement about atoms is correct? Which statement about atoms is correct? Which statement about atom is correct? Fine. So I think it ends up now No, still you have time Okay, one minute. 4 days 6, 9, 2, 5, 8, 5 Okay students, we will see the result now Last one second And the answer is Okay, we will see how many of you have answered it right Oh, most of you have answered it right only Very easy. Fine. So the question is Atoms is correct? Protons are positively charged Nucleons number is number of neutrons No, no. Neutrons are negatively charged, no Atoms contain proton and electron in the nucleus Yes. No which is correct So this is also wrong Protons and electron in nucleus, no Okay fine. Could I move to next question? Neutron is not negatively charged Nucleons is number of neutron, no Yes, next question One minute One minute One minute, one minute So, yes, one minute I will move to next question So next question is this First we will see the result Sir, what is this? What? Grace, what happened? Grace, what happened? Okay, fine. So who is metal? Okay, please students, who is metal? Please tell me Metal, you are not going to reveal? Okay fine, we will see something Sir, what is this? Okay, fine, fine. Wait for one more Two questions, don't worry You can just think the person Before last question, I will definitely click Click him out, okay? So next Okay fine But he or she can tell me the name Okay, next question, don't get worried About that, I will definitely You will get the fair results Okay, here Question is found as small, now you can see the Which diagram correctly shows The ion present in the compound Potassium fluoride Which diagram correctly shows The ion present in compound Potassium fluoride Yes, potassium fluoride Why you don't know? I think at times of no, still you have Three seconds left Okay, so answer for this question is Is Is So C is the answer We will see how to solve this question Very easy question Potassium fluoride, if I ask you formula You all will write sir KF, yes or no? First tell me, formula is KF or not? Yes Okay Now KF is there You know, this is metal This is nonmetal, all of you know this thing Nothing new in that That's why it gains positive charge Nonmetal gains That's why it gets negative charge In other words Whenever potassium loses electron It gets positive charge like this Whenever fluorine gain Electron It gets negative charge like this Any doubt? One minute, what you people are discussing Four by four and all Please tell me, do you have any doubt? No doubts, okay fine Potassium is Losing one electron Potassium atomic number is 19 19 atomic number Means if you see the Electronic configuration 2,8 8,1 Yes or no? 2,8,8,1 is electronic configuration Yes By satisfying the Optet Ok, 2,8,8,1 Now If you go for the fluorine Atomic number 9 2, Because total is 9 So 2,7 Total is 2,7 2,7 Now if there is a plus K plus means Removal of electron If I remove the electron, this electron will be removed So new configuration Is nothing but 2,8,8 So see where you have the 2,8,8 Now what is the fluorine? Fluoride ion 2, because it is gaining electron So this 7 become 8 2,8 Now see which is the configuration First shell has 2, then 8, then 8 So it seems like 2,8,3 shell should be there In potassium, yes 2,8,3 shell So 2,8,8 It seems correct It also seems correct C and D seems correct for potassium If you go for the fluoride 2,8 2,8 seems correct Here 1 minute How come both are correct Just a minute Both are correct Both are correct Yes Sir Sir Sorry, sorry Very good Sir is wrong, answer is C Because it is minus here Is it clear to all of you? Is it clear to all of you Answer is C Sir can you please change it Sir can you please change it in mentee Some of us would have marked C What is the answer there? It is C only C is correct So C is only correct Yes I am moving to next question Yes, fine Okay Just give me 1 second I will remove this Fine, we are moving to next question You can see Okay fine Very good Gargi, Anu here Okay I don't know how to pronounce ELMO Please help me in that Okay so next question is this If you face any issue you can refer this What do the new PI 1H1 Hydrogen Atom contains? You have only 30 seconds to answer this 30 seconds Okay fine I think it times up yes Okay answer for this question is New PI 1,1 You know wherever you have any element This is the thing which you write here This is the mass number I told you in class also This is mass number And the thing which you write here is the atomic number Is the atomic number Or number of proton Or number of proton Number of proton Now if you see 1,1 Proton is 1 Mass number is 1 Mass is nothing but Neutron plus proton Neutron plus proton is mass So if you add these two You will find that there is no neutron Because mass is also 1 The answer is proton only Any doubt? No doubt could I move to next one Sir is it atomic number number of electrons? No atomic number is number of electrons Only when there is a neutral atom In case of neutral atom Atomic number is equals to number of electrons Neutral atom, electron and proton are same Or atomic number is same Electron, proton and atomic number All three are same In a neutral atom But if you don't have the neutral atom If you don't have the neutral atom Let's take an example If I say sodium plus Atomic number is? Atomic number of sodium is? Atomic number of sodium is? No not too well Atomic number is 11 Okay proton is? Proton is? 11 But what are number of electrons? Electron from? Because I have written Na plus Okay you people are going wrong here I have written Na plus Not Na Ne has 11 electrons 12 No no Na plus Plus means it has lost the electron Neutron is 11 Negative When you lose When something lose negative charge Then only it will get positive charge So it has lost one electron The other number of electrons are 10 Understood So atomic number and electrons are not always same Am I clear Yes sir I am erasing all this thing Okay fine So Next question Oh Disappointing We'll see who is leading now So Very good Gurgi and Elmo Anulia, LTS, INR Next picture You can refer this If you still face any issue Please let me know Very easy questions We are playing around this Neutron, electron Proton, ion, isotope Isobar, isotone That's it I can't even see Gurgi I think it's quite visible to all of you If any other has facing any issue Please let me know How can the number of nucleons be lesser than the number of neurons So what's the correct answer Times up Now see Question is The table shows the nucleon number How can the nucleon number be lesser than the number of neutrons Okay What's the reason I didn't know The table shows the nucleon number and the number of neutrons in one atom I didn't understand Okay one minute The table shows the nucleon number and the number of neutrons in one atom of isotopes WXYZ Isotopes are given The number of neutrons they have given Which statement about WXYZ is correct So if you see Okay So the nucleon number is only 333 and 4 So the number of neutrons is 18, 20, 20 and 22 Okay fine This should be atomic number Are you writing something Yes yes I can't see anything This should be atomic number So can you redo the question without explaining it So then we can actually do it Okay if the atomic number is given One minute The nucleon number they have given Which statement about WXYZ X and Y are isotope Isotope X and Y are isotope So can we redo the question sir Why So because It's marked wrong and it's confusing So then at least W and X are isotope of same element So you can just continue This is fine Okay fine one minute Okay after finishing this I will delete this Okay once we will finish all the quiz Then I will delete it Fine Okay next question So I will delete this question later Next question What happened what happened No no I will not forget You tell me before Okay now next question one minute So this is the next question So the screen is black for me Okay I don't think that it's black For all of you because I am also Seeing the screen in my phone So I think it's Okay anyone else facing Any issue please let me know In this Okay fine please refresh it Which element has atomic structure This Okay fine So I need to delete question number 7 Okay I will delete it Answer is B And many of you have answered it wrong See if you want to see the result Maximum of you have done it wrong Why more than 50% Fine I will tell you how to do this You know Electronic configuration we will write it very easy Question number of electrons given In first shell there are 2 electrons In second shell This is first shell Second shell 2 2 4 2 6 2 8 8 electrons 1 2 3 4 5 5 electrons Calculate total is 15 15 is nothing but force for us Atomic number 15 is force for us Why you people have made mistake I don't know Okay tell me if anyone has any doubt Please ask students If you have any doubt Do you have any doubt Yes or no No doubt Sean It's very easy question I guess Sir I couldn't see it because of the blank screen That's why I had to mark it Okay but still how many Instead of counting elements I counted number of letters Oh my god Monisha what you are doing Okay fine You know if someone has gone through Using the 16 neutron So he or she must have answered C But neutrons are not same as the number Of proton So that's why don't take 16 Neutrons may be different Okay next Okay wait I'll show you the results This is the C17 students Second most selected So use your brain student And Anuya is leading Very good Anuya Fine Next question This is the next question A relative atomic mass Of chlorine is 35.5 When calculating relative atomic mass Which particle is the mass Of chlorine atom compared to 30 seconds 30 seconds Okay answer C12 I told you all the atoms Are compared with the C12 An atom of C12 that is a reference This atom is reference Okay next question I think all of you have answered it right I have never seen a I have never seen a Yes Can you go back it's Relative mass is 35.5 Yes So Isn't 35.5 How is Can we put in the formula No no When you put into formula See relative atomic mass is always 35 You know that how you got 35 And 37 Because it is 35.5 Is obtained by the two isotopes Cl35 And Cl37 The Cl35 and Cl37 Will Are going to decide that Actually this is 25% in nature That's how you get Relative atomic mass is 35.5 But this 35 and 37 are nothing But with respect to C12 Understood Okay what's the formula Formula for calculating 35.5 Okay Anyone else who has any doubt In this Any doubt Okay what's the formula group the formula will be Relative atomic mass of any element Is mass of atom Mass of atom Divided by 1 by 12th part of 1 by 12th mass of C12 isotope This is the formula Okay Relative atomic mass is always With respect to C12 Could I move to next question If all of you understood this One minute one minute Students please don't write You haven't learnt this Okay R&R haven't learnt this R&R students you can't say this thing I have told you in class Don't say that you have not learnt I told you mass of an atom is always With respect to C12 Yes or no R&R students No sir No sir I remember I told you in the class like Okay fine then Nephel I remember Nephel students R&R also I think No problem there are But you should remember this okay I think in last year last year You must have had this question Question like this So can you just calculate it so Okay Fine see this 35.5 is not going You are not going to find this 35.5 By this formula By this formula you will get the chlorine mass As 35 and 37 Or these are the experimental Data's using this formula you got the 35 and 37 what does this mean Chlorine Chlorine isotope that is having a 35 Mass is 35 times heavier than 1 by 12 part of C12 So one So can you at least calculate the 1 by 12 part of C12 what does that mean Like calculate 1 by 12 part of C12 is nothing but C12 is 12 AMU C12 is 12 AMU This is experimental value When C12 mass is 12 AMU What is the 1 by 12 part of C12 It is 1 AMU Now it is the denominator is nothing but 1 Yes Hydrogen atom is 1 AMU So this denominator is nothing but 1 AMU But you don't define with respect to hydrogen You define with respect to Carbon 12 Earlier people took hydrogen as a reference But I told you in class that There are some problems with hydrogen it was Not giving you whole number ratio for all the atom That's why people deleted this So 1 AMU Is the denominator Now when the denominator is 1 AMU I say relative atomic mass of sulphur Of sulphur is 32 What does this mean Mass of sulphur atom Using this equation This equation If relative atomic mass is 32 it is observed By mass spectrometry We found that relative atomic mass of sulphur Is 32 using mass spectrometry Okay So mass of sulphur is nothing but How much 32 Into 1 AMU So mass of sulphur atom is nothing but 32 AMU Is it clear All the masses are defined like this What you people have started discussing I love mango and all I will throw you out Okay Is it clear students Yes R&R students Yes Okay Next question Please remind me after 15th question I will change the I will delete the 7th one Just remind me after 15th question Okay Next question Okay Next question is this Atom contains electron, neutron and proton What is the definition of nucleon number 30 seconds At least in this question I want That a single line In the entire chart At least so I have never seen a single line in chemistry Never So Okay Oh my god Still many students have made mistakes Okay no problem Atoms contain electron, proton, neutron What is the definition of nucleon number Nucleon has nothing but Neutron Plus proton in any atom That is a nucleon And this nucleon number is nothing but mass number also That is nothing but mass number So number of neutron in nucleus of an atom Number of proton in nucleus Proton number of neutron and proton See is that sir Please gandhar Do you want me to remove you Okay fine I am moving to the next question Okay no problem I heard some voice that's why I And you were muted Okay Oh Dhruv was there Sorry gandhar Dhruv please don't do Now we are moving to next question So this time all of you got good marks So who is leading Anulia NPS INR Is leading Good Anulia Sir I didn't do anything Okay next question The diagram shows the atomic number Of an element X What is X This time please don't make Mistake That's true This is easy question Nobody is teaching Sir it kicked me out of the quiz Sir it kicked me out of the quiz and it got me back And it's a correct answer And it says how it can get the answer But it says I couldn't answer in time Yeah it says it's fine sir Okay fine Now I think I am able to see The question in my mobile So basically whoever did it So when that The quiz stopped working Whoever didn't answer before that I couldn't vote in time so Sir time up Okay time up So question is very easy The diagram shows the structure And they have asked you the atomic What is the X element X So these are the shells given to you Now proton, electron, neutron, X If you see 1, 2, 3, 4 4 electrons 4 electrons is nothing but Hydrogen, helium, lithium Varylium 1 electron, 2 electrons, 3 electrons 4 electrons This is one way of doing If anyone knows the configuration also 2,2 is the configuration of Varylium Fine Just one question I want to ask What is the configuration of aluminium What is the configuration of aluminium Anyone Okay atomic number of aluminium 7 is atomic number 2 No no wrong Sir atomic number 13 So 2,8,3 Atomic number is 13 my dear 2,8,3 sir So configuration is 2, Because 13, 8 and 3 Okay There are if some student is facing any issue in writing the configuration I will help you in one line If in one cell Okay maximum number of electron In any shell Maximum number of electron In any shell I think few students are facing issue Maximum number of electron in any shell Is nothing but 2 n square So if I ask you one first shell How many electrons could be accommodated That is 2 into 1 square That is 2 How many electrons are there in the second shell This is first shell And this is the second shell Second shell How many electrons you can put it here 2,2 square 2,2 square is 8 Now if last question I am going to ask what is the configuration of argon What is the configuration of argon No I will not ask the atomic number Argan configuration Argan configuration Because atomic number is 18 18 Maximum number of electrons in first shell Is 2 Maximum number of electron in second shell Could be 8 But still you have 10 electrons You have still the 10 electrons What about the next 8 Next 8 will come in this Okay now I know that most of you are going to make mistake in the next question What is the atomic What is the configuration of calcium What is the configuration of calcium I know most of you are going to make mistake 2,8,8,2 Okay there are 2 options 2,8,8,2 or 2,8,10 2,8,8,2 2,8,8,2 2,8,8,2 No one is with me I can't say 2,8,8,10 So it's 2,8,8,2 Yes it's 2,8,8,2 2,8,8,2 Maximum electron in the last shell Can't exceed 10,8 Okay In a configuration just remember this We will discuss it in detail In some chapter As of now Maximum electron Okay I am talking about CPSC students So we are CPSC students So we are CPSC students And we are CPSINR We learnt it last year Okay then all CPSC all So but then we do follow We do follow the follow Last year we didn't follow NCRT Ahan We had ICSU Okay one minute INR students do you know this Calcium configuration Okay fine Okay you just need to 20 only in class 9 also But I will teach you more In my next quiz I will take more Than 20 also Okay fine moving to the next question Okay so This time also I didn't get a single line We will see the results first Okay Anuya is still On the first position and Now Anush is coming okay good Anush NAPL has a very Different set of syllabus still you are In the list in top few It's good Which statement comparing The properties of electron, neutron and proton Are correct Which statement comparing The properties of electron, neutron and Proton are correct Okay So Answer Yes sir Okay so what is the answer which statement Comparing properties of electron So neutron and proton V is the answer Now I want to ask you one simple question All of you are saying V is the answer Because neutron and proton both are heavier Than electron and one electron And neutron only electron and Neutron are charged no Electron and proton are charged Neutron is neutral Proton has Now I just want to ask you one question What is the rnr9 student Will not going to reply Please rnr9 please don't reply this question Okay what is the ratio Of mass of Proton Is to mass of electron What is the ratio So 1 by 1 8 7 7 1 by 1 8 7 1 by 1 8 7 1 by 1 8 3 7 1 by 1 8 3 7 Yes so 1 by 1 8 3 7 1 by 1 8 3 7 It is 1 by It is not 1 by 1 8 3 7 Students you all are just 1 is to 1 8 3 7 No So 1 by 1 8 3 7 1 8 3 7 is to 1 1 8 3 7 is to 1 Yes 1 8 3 7 Yes 1 8 3 7 Okay what I want to tell What I want to tell in this question What I want to tell Mass of proton is almost 2,000 times Mass of proton is almost 2,000 times More than mass of electron So if I ask you Relative mass If I ask you relative mass of Neutron, proton and electron No rnr9 student Only C No autonomous syllabus Students have autonomous syllabus Please do tell answer of this What is the ratio of relative mass What is the relative mass ratio What should I write Just tell me answer of this Sir 0 We are 0 So 1 in 1 Okay anyone No Okay see proton and Neutron mass are almost same Proton and neutron has almost same mass Okay If I Put relative mass of proton as 1 What should I write in these 2 columns Proton as What should I write the mass of neutron Neutron Sir 1 Neutron is also 1 Because both are same Now tell me what is the answer of this What should I write 1 by 837 Okay 1 by 837 is almost I asked you relative mass Can I write it as 0 Very small So that's why Sometimes we write it as 1 by 837 Or we write 0 That's why in any Atomic mass We always write mass of Proton plus Neutron Mass of P plus mass of N We never consider Mass of Electron Because we neglect the mass of Electron due to this very high Ratio Is it clear to all of you Many of you could have this doubt That why we neglect mass of electron This is just to explain All the students other than R&R9 because I know I thought this thing in R&R9 So we have learnt this in the last year So why You were not able to answer this You should have answered in one second only You got 0 Okay next question Okay Now an atomic structure Of four particles are shown These are atomic structures Which two particles are isotopes Which two particles are isotopes Okay Okay those who have all Okay fine fine Sir time is over sir Okay fine This question is very easy They have asked you the two particles are isotopes Isotopes means Same proton Same proton I told you there is one thing I told this to R&R students R&R9 Isotopes means same proton You all know same proton Okay Isotone means Isotone means Same And the last is isobar Isobar is Sir you have topping screen sharing all of a sudden Okay one minute Can't you see Can you see my screen all of you Can you see my screen all of you Can you see my screen all of you I think I am Okay Isobar is Isobar is same mass Same mass number So these things you need to remember Isotone means neutron same Isotope P means proton same Isobar means mass number same Okay So in this question they have asked you isotones Isotopes Isotope means without the two Isotopes where the proton number are same Proton number are same in this And the answer is W and Y This question is very easy But why I added this question To tell you the isotone and isobar also Can you tell me what are among these Having are isotones What among these are isotones Write it Isotone Y and Z Only one combination W, X, Y, Z Y and Z and W and X These are isotones Now last question What are isobar Isobar What is the What all combinations Are there for isobars No isobar No isobar sure Anyone who got isobar No isobar Total is 19 10 plus 9 19 Here it is 18 Here it is 16 Here it is 17 No isobar Okay is it clear to all of you Yes Could I move to next Okay Next question Students in this question if you are making mistake It's very disappointing it's very bad actually You should Answer it properly by saying the total number But those who have made mistake I want to just clarify that Whether you understood or not There is no problem If you make mistakes But if you have understood or not That's a very important thing Okay next question I will read the question Two atoms X and Y can be represented As shown What is X 41 Y 45 They are on the top of the X and Y And at bottom it's 20 and 20 Which statement is not correct X and Y are atoms of different elements X and Y are isotones X and Y have different mass numbers X and Y have same number of electrons You have 20 seconds to answer Sir time over Okay X and Y can be represented They have asked not correct The answer is A Okay so X is 41 and 45 These are the mass number 20 and 20 are the atomic number So X and Y are atoms of different element No that is wrong They are same element because atomic number are same X and Y are isotopes Isotopes are only when they have the same mass number The mass number are different So they are not One minute are the isotopes Are they isotopes Same proton number Yes sir they are isotopes Yeah isotopes X and Y have different mass number X and Y have the same number of electrons Yes sir protons are same Electrons has to be same Answer is A Let us see how many of you got this question Oh my god Students tell me where you are facing issue This is the repetitive I am repeating I didn't see the note What you are saying Monisha Sir I saw the question on your screen and read it The time was almost over Okay I kept it 30 seconds I thought it is a very easy question That is why I kept it 30 So next time you can So can you make it bigger to see So because it is very difficult Or you can integrate the question into Menti by typing the question out Okay fine See next okay I will do that Now next question is I will keep the timing little more Because it seems like Many of you have Answered Without reading the question also Okay fine we are moving to the next one This is the next question Two atoms have same Relative atomic mass Different chemical properties You have 60 seconds for this Two atoms have same relative atomic mass But different chemical properties Which two atoms of proton neutron number Of these two atoms is correct Proton number neutron number Fine So we will see the Oh Fine Only you students Have answered the A Maybe the answer is wrong So it's B Has to be B Okay wait Two atoms have same relative atomic mass Relative atomic mass is same But different chemical properties So these are isobar Same relative atomic mass But different chemical properties Which row about the neutron Number of these atoms are correct Protons are Different Neutrons are different So if protons are different Neutrons Must be different Then only it will be isobars Are you getting what I am saying So it is not Isobar Fine So it says that the Relative mass is same That means one component has to be Same and that has to be the neutron Again you are not understanding Mass number is equal to Neutron number Neutron number is same and guys What tone Neutron is neutron plus proton Okay This Let's say what happened One minute Monisha we can't hear you I will just type it out Okay Neutron, Neutron number is Neutron plus proton I am saying that Neutrons are same Neutron number are same means Some is same If some is same And you know that isobars are always The different elements They can't be the same element Isobars can't be the same element Means proton number must be different If proton number must be different If I am saying that sum is equal to 15 Let's say If I want sum is equal to 15 Okay Number is one is the four And the other one is four So the neutron number Must be equal 11 and 11 But I said that For the isobars Proton number must be different Two elements must be different Elements to be called as isobars Because they have the same Nuclear number So if they are the same They have a different proton number Means one term is definitely different If one term is different the second Has to be different Is it clear You can't have 15 If you want to get sum equals to 15 And one term is different Then second term must be different Anyone has any doubt The sum of neutron proton has to be same So if proton is different then Neutron can't be same I thought you have doubt But you have written the same thing What I am saying Students Answer is the same Answer is same idea Why you are asking this This means that you didn't understand the question Students please ask me Because this type of question I will not take again In the centre part Okay see Atomic mass is same Atomic mass is same means isobar Isobar means same mass number Or mass is nothing but Nuclear numbers Nucleon So if I say nucleons are same Nucleons are same That is proton plus neutron Nucleons are same means Proton plus neutron are same So this sum is same And if this sum is same for two elements X and Y If this sum is same for two elements X and Y means If any of this changes Okay if any of this changes If I write it as a proton number Proton for X Neutron for X Here I will write proton for Y Plus neutron for Y I know that proton are definitely different Protons are nothing but atomic number Atomic number I will give you just an example You know the phosphorus is 31 Phosphorus mass is 31 Or sorry 32 And what is the mass of sulfur What is mass of sulfur that is also 32 Okay So both are having same mass number But they can't be the same atomic number They can't be the same atom So proton number must be different If proton number must be different Neutron must be different To balance And give the same nucleon number So here the phosphorus has 15 atomic number Sulfur has 16 atomic number But sulfur has 16 neutron Phosphorus has 17 Phosphorus has 17 neutron So you can't have the same proton And neutron at all If the mass number is same Am I clear This is an example in front of you Is it clear to all of you First tell me Yes sir Yes sir So fine I think This question will change the Results Only 8 students have answered it Good Who all 8 Please tell me Who 8 students have answered it We have to read the 7th question Very good Monisha Very good Gandhar, Karun We have to change the 16th question Okay one minute So Okay one minute That was the 6th question There is a question Okay one more question Then we will finish and we will see the results at the end No worries, no worries You can always see the results Okay last question People show the particle present In the nucleus of 4 atoms For ion Okay Please one minute Okay the B option Is 1 and 4 The option if someone has any doubt 1 and 4 B is 1 and 4 Okay fine So please let me know once the time is over So time's up Okay fine So table shows the number of particles present In the nuclei of 4 atoms 288, 288, 288, 1, 288, 2 The particle belongs to Same element Now they have given atoms for ion Okay The same element with proton number same That's 4th draw The same proton number is for these 3 atoms These 3 atoms have same proton number So if you see Answer is 1 and 2 That's the best answer 2 and 3 Okay one minute If you see the configuration 2, 8, 8 2, 8, 8 2, 8, 8 1 Here So 1 and 2 So I am half table it goes wrong once What Particles belongs to same element So 2 and 3 are the same element Please note your Aditya So if you see This is nothing but potassium 2, 8, 8, 1 And this is nothing but K plus ion This is nothing but K plus ion This 2, 8, 8 Is nothing but argan 2, 8, 8, 1 is argan 2, 8, 8, 1 is argan Okay Now This is calcium So answer will be 2 and 3 Answer is 2 and 3 You need to go like this Okay Because this is potassium This is calcium Okay Fine So we will see the result now Answer is C Okay now I am going to change the answers Just give me one second Just tell me which was that question So question 7 Okay one minute Let me give you Question number 7 answer What was the answer You don't remember Okay final check one minute Question number 7 One minute So how did you ask me for the last one So the question Wrong Okay one minute Question number 7 So Yes tell me What were the last questions answer Last question Protons number Yes last question is Somewhere it's like proton number If you have born with a proton number it is also wrong So I will consider A and D are the answers In last question I will mark A and C both are correct Okay No no D is not there 2 and 4 can't be because protons are different 1 and 2 So answer is A and C for 16th question 16th question A and C I am marking it A and C don't worry A and C is the answer for 16th one And for the 7th one 1, 2 1, 2, 3, 4, 5, 6, 7 For 7th question you are saying answer is C Yes Delete the question Delete the question Okay fine So just delete both of them So what are you doing So delete 7 only Okay just a minute So better to delete both Okay one minute students Could you help me in deleting I have not deleted any question so far One minute So here option is I am sharing my screen Fine Yes Where is the option of deleting the question Oh Sir you can go to the side And delete it Okay otherwise Okay So you have to go there Okay I deleted Okay I deleted that question Fine Okay fine Fine 7 Q 7 question Yes And 7 only And the last question is Last question is this Here also it is the option So why See you don't need to delete I don't need to delete the question so it is correct See you can delete the options I didn't actually Okay okay one minute Fine We will leave the leaderboard Okay fine now I am going to the leaderboard So your presentation The last one is not marked properly Okay but But if you see the option Only two options seems correct Okay one minute If you go with the options Only two options are correct Now I am going to the I will announce the result A and D Means there were two options A and C whatever Okay fine So now I am going to show you the result See you can actually Go to maintain start from the last question What Okay maintain start from the last question only There is one more So it just keeps spamming it is a rich Yes yes yes I am doing that One minute Okay this is the last one So you delete it So you delete it slide and then Leaderboard slide Okay fine Here the last slide I am deleting It is okay sir no points Okay Okay I will do one more One more This is the last one Okay One more One more Not working the mind Just a minute One minute One minute I think Anuya is the winner only Okay So I think the last one is not going Away I don't know why it is not going Just a minute I am going to the last slide Okay wait We will see the last result don't worry We will see the last result Anuya is leading For this For this question also Anuya Anush now next question is Okay this is the next Here it is Anuya is the winner For the previous question If you see Anuya is leading and Shrijan Ghost is the second one So last question I have deleted If you don't consider last question Anuya and Gargi are the winner Fine You got the result Congratulations Anuya Not Gargi Okay sorry Gargi Congratulations Anuya Nishant you have also played well Okay Thank you students What happened So right So yeah this is This thing is so second I have to check it One Anuya Monisha your voice is breaking I can't hear You No Anuya sorry Monisha Monisha please type the message If you want to say something Okay so winner is Anuya