Other Periodic Table Trends

[XxA5AFxX]

13:18 tits on youtube

[bangdude101]

13:19 distance between two tits

[LucianoMyths]

Is it because the nucleus is more compact than the electron cloud, so that each electron feels the full attraction of the nucleus for that distance from that nucleus at anyone time but not the full repulsive forces from the electron cloud at anyone time because of how dynamic it is?

Or is it something else?

[LucianoMyths]

Why does the nuclear charge overcome the electron repulsion when going from left to right across the period so that the radius of the atom decreases rather than staying the same?

[xBubbliex3]

Thanks for making this clear in a simple, fun, animated way :D

[jonnylopez545]

your video help a lot for my test thanks 

[satisfiction]

Linus Pauling indeed was the vitamin C guy, and he lived to be 93 years old!!!!

[boxerek123]

SUPER DUPER HAPPY

[boxerek123]

'what just happened?' hahahaha

[KittyMeat3]

Gosh thank you :) Great review for my chem final! Plus, the interactive transcripts really help with jumping around, going back, and what not :)

[MediumNothinFull]

13:05 boobies

[patrickrancore]

@MediumNothinFull It is clearly instructions on motorboating if you mute it.

[MediumNothinFull]

so meditate on having 8 electrons in my outter most shell?! ..im gonna...

[whydizz]

You started to use the words atoms and electrons interchangeably around 9:00 which is incorrect. other than that- awesome vid

[kokocipher]

@whydizz give away electrons, not atoms. Someone needs to put up some notes in the video so ppl won't be confused xD

[satisfiction]

@whydizz lol he does that

[goldensilverstar]

HE DREW TITS/BOOBS

[oliverscott2007]

Thanks.

I had been reading up on this in the text book but your illustration helped me get the increasing and decreasing trends going horizontally and vertically across the table.

[Smo459]

I love you. With a passion.

[boax02]

i skip a lot of my classes and i must say the internet is filled with information on anything and i surprise my teachers by getting close to 100% with not even going to school

[mini72396]

5:05 is hilarious

[kingman4889]

CHEMISTRY: for retards

[samsonite58]

I LOVE THIS GUY <3333, btw im a guy. PROBLEM?

[stop08it]

my goodness -- thanks for saving me from a horrible chemistry book and a horrible chemistry teacher who could not care less if her students understand the topic or not.

[miniman001]

So is electronegativity only described with covalent bonds?

[DeathClock007]

@teddyakak Glad you noticed too! Thought I was going crazy for a sec xD haha

[6feetdownedge]

My damn teacher says this is easy!

[wuzuphomeyg]

@6feetdownedge OMG. SAME!!!!!!!! WTH.

[teddyakak]

!!!!! CORRECTION !!!!!

electron size goes from the {{TOP-RIGHT smallest }}

to the {{ BOTTOM-LEFT largest}}

[linenbox]

@teddyakak atom size?



[MegaLalablahblah]

@teddyakak I'm glad you said that. For the first time watching these videos I started to get confused.

[teddyakak]

!!!!! CORRECTION !!!!!

electron size goes from the {{TOP-RIGHT }} to the {{ BOTTOM-LEFT }}

[seaweedsupper]

5 people can't find a covalent bond

[coolguy272829]

13:07

[ithbaseball21]

Can you make a video about naming covalent and ionic compounds?

[Iodine24]

WOW!!!!! MIT, man!! AWESOME!! I'm Bengali, and very proud of your accomplishments!!!!! Inspiration?! Motivation?! YES!!!

Your on WIKIPEDIA!!! lol.

I WANT TO MEET YOU ONE DAY!!!!! Man, does it feel good to know that one of us can achieve so much!!! THANK YOUUUU!!!!

[Geyserrock]

if i may ask, could you please do a lesson on the shielding effect? :)

[sammyg101696]

@Geyserrock The shielding effect works like a refrigerator magnet works. First, it sticks very well to the fridge, and then you start putting things in between the magnet and the fridge, and the strength between the two decrease. The same works with protons and electrons. If you have more electrons between a certain electron and the protons, the attraction between that single electron and the protons decreased, also making it easier to remove that electron and decreasing ionization energy.

[2k8Twins2k8]

really helped with science coursework, thank you.

[crazyp24]

amazing

[msms47]

love it

[limetreess]

Wait, so if the largest sized atoms are to the left and down then wouldn't the largest atoms be in the bottom left and the smallest atoms in the top right of the per. table so size would go from the top right to the bottom left, not the bottom right to the top left, as you said?

[Epifrin]

@limetreess I think he made a mistake. Well spotted (me too!)

[gmgunner]

Super-Duper-Duper Difficult.

[benja303]

Think of group 1 as 40 year old virgins, they REALLY want to give it up!

[toushiro62]

i swear u tought me more in this 15 min video that my teacher did in during our entire chem unit

[purpleleach1]

I wonder if metals can be turned into gases with enough heat.

[Kirk00077]

@purpleleach1 Yes, they can. Gold, for example, will vaporize at 2300 C.

[basskid121]

You're make my professor look like a fool!



[sonicboom704]

u make the concepts very clear!i dont knw how can someone dislike this video?:I

[Petro7]

The analogy I like for this is a race car on a track shaped like a lop-sided figure 8. there is a higher probability that the car will be on the bigger loop than the smaller loop... in this case the oxygen atom will be a bigger part of the loop whereas the hydrogen will be the smaller part

[AnimeWolfHunter]

Agh , I'm sry I hate correcting ppl that are just trying to help others , but just to let you know .......... Those layers that the electrons float in , aren't called "shells" . Their actually called " energy levels "

[fakirJ]

wow man. these videos should be the most epic successful videos among chemestry noobs like myself. congrats.

[AutumnxDay]

Thanks so much..! I needed a bit clearing up and this helped. Donyabud. ;)

[ThePaullett]

Confused mess. Not as well done as others.

[AutumnxDay]

@ThePaullett Lol yeah, I had to replay a million times. XD

[pooppeeyoupants]

FAN OV UR VIDS I watch them everyday :D

[DrewDannyKyle]

this is helpin me with my IB chemistry exam lol

[scimath42]

Electronegativity, one atom hogging electrons more...Sal, you've explained this to me better than any chemistry textbook has.

[ShumbaMuata]

nuclei*

[jessneurismfarmer]

In class, I want to get out of the class as soon as possible. When watching you, I can't wait for the next video.

[paulceltics]

didnt know youtube is this useful

[Krizbo]

I just thought of something while watching this video.

Since helium is really stable and nonreactive to other atoms, does that mean breathing helium has no side effects? (Besides the fact that if I breathe only helium and not oxygen).

[shadowkidn1]

I REALLY LIKE THIS SOO EDUCATIONAL 

[mobabur94]

13:03 BOOBIES

[livelaughloveice]

thank you SO much!!!!

[BoIoko]

Watch out. At the end of the video he meant :the radius increase from right to left and from top to bottom.

[feraligatr8]

I'm downloading these and giving them to my friends coz our chemistry teacher sucks :/

[007coolio007]

13:09 BOOBIES.....yeah im immature.

[TheChiefAtlas]

@007coolio007

LMAO I thought the same thing xD

[bsangoz]

how do i get back to your list of chemistry subjects i dont know how! now i dont know which video goes next!

[MyRealNameIs28]

@bsangoz I just follow a playlist.

I don't know but maybe this helps:

youtube.com/watch?v=XMLd-O6PgV­s&feature=autoplay&list=SP1660­48DD75B05C0D&index=9&playnext=­8

[Luigi84289]

Covalent bonds are the hardest to break.

[NOCOMPLACENCYCOM]

you drew a symetrical, straight water molecule at 6:00! I'm sure you know, but, H2O is a bent molecule, highly polar, etc. DO NOT LEAD THE NOVICE CHEMIST ASTRAY!

(LOL)!!! Good per table trend videos, though!

[Luigi84289]

@NOCOMPLACENCYCOM Yup due to Oxygen being 2 shy of 8 in the outer shell and Hydrogen being 1 short in it's outer shell.

[azumpxo]

what about electron affinity? & effective nuclear charge? ahhh helpppp :(

by the way your videos are about 23998x more affective than a month's worth of class w/ my teacher.

[absportsman]

i had to comment on my appreciation of this video, i have an awful teacher, and these 15 minutes taught me more than a week in her class. thank you very much

[Pokemonemberiot]

3 people failed in chemistry subject

[MultiMuffin21]

THANK YOUU!!!! :D

[WillyBaltaFilms]

13:07 .... *Chuckle*

[mikolchung]

@WillyBaltaFilms "it's just the size of atom" *double chuckle*

[pabloishere]

super duper happy

[MrJas1991]

i love you

[cyberprodigy]

AAMMAAZZIINNGG... I wish I had chemistry teacher like you when I was growing. So much sense. Excelent talk.

[Luigi84289]

@cyberprodigy Mine was good like this guy but we didn't learn it the same way. I didn't realize the shell theory had changed so much in 11 years.

[CcanCcaglar]

my teacher buys powerpoint slide lessons, then just clicks and reads off each powerpoint, and calls that "teaching"..... i feel sorry for my self...........thank god for you Sal...i just hope you make more biology lessons on foods (carbohydrates/lipids proteins etc..)

[ranayaz101]

@CcanCcaglar Omg my teacher does the SAME EXACT THING!

[hellomyfriend2053]

Why does oxygen go down in Ionisation Energy? eg. the divets in the graph??

[jcon16]

@hellomyfriend2053 There are 3 p orbitals available for filling in the second period (the one that starts with Lithium). Nitrogen (the one before Oxygen) has 1 electron in each of it's p orbitals. Oxygen has 2 p orbitals with 1 electron and 1 p orbital with 2 electrons in it. Half filled orbitals are better than orbitals that are partially filled. Therefore, it takes a little less energy to remove the one paired electron. Removing that extra electron from oxygen leaves a half filled orbital

[hellomyfriend2053]

@jcon16 Thanks

[cardboardhome]

9:34, just in case you guys didn't realize, but I do think he made a mistake by saying atom, I think he meant electrons. Correct me if I'm wrong though.

[dhaccessories]

You are the best teacher I've ever come across. Thank you.

[Linkmaster46]

you blow my teacher out of the water.

[YoungBelle95]

shielding is when the electrons try to keep a hold of thier electrons without being attracted by the others in a molecule.....i think......

[skadorkable]

Quick question: What is SHIELDING? My teacher said it's an important term.

[AW1233333]

I am sure you saved many ppl's lifes. Keep making videos!

[ghos2277]

I wish we could clone people. Then all our teachers will be Khan, which = awesome teacher, and good teacher for everyone!

[DpnElement]

@ghos2277

When you clone people, experiences and knowledge are not cloned.

They are earned.

[DpnElement]

Nevertheless he is an amazing teacher.

[FastKid26]

@DpnElement Way to rain on his parade lol

[yuckyfart]

what is my name>

[Mauser91]

I like this video a lot, since he choose to finally tell us how a molecule appears. You know the O-->2H.

I've been wanting to know this ever since beginning. Another great job

[ro2nie]

Correction: 15:04, the electron size resultant should be from top right to bottom left corner.

[VinzJoker]

@ro2nie thanks for helping me out lol. i was pretty lost when he said that..

[jon1285]

@ro2nie I think he meant atomic size, right? Atomic size increases, from the upper right corner of the periodic table (being the smallest), to the lower left to Cs (being the largest).

[damuschka]

@ro2nie you are right!

[jabberwocky685]

I love your style and approach to YouTube! no nonsense :)

[BingWallaBang]

I think two people missed the Like button. :\

[Mrracer67]

@BingWallaBang must have been teachers jealous he can teach better than them.

[SuperBecksy]

Okay, well this is a crazy, inane idea, I just want to know if it could ever be possible. I tend to miss the obvious so someone might have to point it out to me.

You know how the immune system can reject foreign substances, well could it ever be possible for an atom to reject foreign electrons from another atom? and if so, could this be used to stop CO2 from forming?

[SuperBecksy]

Okay, well this is a crazy, inane idea, I just want to know if it could ever be possible. I tend to miss the obvious so someone might have to point it out to me.

You know how the immune system can reject foreign substances, well could it ever be possible for an atom to reject foreign electrons from another atom? and if so, could this be used to stop CO2 from forming?

[vaispatu2006]

Thank you.

[creamphuff]

Correction: At the end you said "electron size goes from the bottom right to the top left" and drew the arrow up and left. I believe you meant down and left.

[XpliciTTRecords]

@creamphuff True

[FamilySmith]

WOW! I loved your teaching! I just texted two of your videos on trends to all of my chemistry study pals. We are so grateful! Thanks a gazillion! You fill my outer shell with happiness and knowledge! Gracias! Danke Schonne! Thanks! Merci!

[red115dragon]

THANKX,, ALOOTT, A DOZEN,, all of my class just can't get this lesson,, our teacher explained it really fast we understood nothing,, but you made it much more easier

thx, i will never forget how you helped me to the rest of my life!!! :D

[dtn93]

Your videos are great for quick review before tests! Thank you so much!

[alldae09]

YOUR THE BEST we all love you

[tictacteaux]

so good! very easy to listen to as well as understand. this was an excellent review before my final. thanks so much!

[Roh1and]

Very nice overview, really helped with electronegativity.  No electron affinity?

[BearofNH]

Great explanations!

Linus Pauling Trivium: He's the only person ever to hold two unshared Nobel Prizes.

[jmea01]

thank you for the helpful videos.They are very comprehensive.I was able to cover a lot of topics to refresh myself for my upcoming exam.

[angelbabykari]

I really do love your videos...when I dont understand something in class, I just come on youtube and put on the corresponding video!!! lol

[debeatt]

Electron affinity is the ease at which atoms can accept electrons (depends on how full the subshell is). helpful tool: any trend that starts with or has a word that starts with the letter "E" tends to increase across the periodic table from left to right and bottom to top >^. examples include: ionization "E"nergy, "E"ectron affinity, and "E"lectronegativity.

[thebigdille]

wouldnt metalic nature be the same as electron affinity?

never heard of metallic nature

[Stonedbrownguy]

wow all these positive comments. You know if we all paid as much attention in class as we do to these videos, we wouldn't be watching em. Great vids though!!!

[jabberwocky685]

@Stonedbrownguy some don't have very good teachers ^.^

[pure5abi]

@Stonedbrownguy the main reason why people don't liek paying attention in class is because most school teacher do no know how to teach as well and keep the class interested as well with a strong speech and humor as Sal has. Sal's way of teaching is more appealing to people in my opinion, more teachers need to adopt such teaching skills. 

[TheFarah91]

u teach more like a friend than a teacher. keep the good work ;)

[UlTrA2GaMeR]

@TheFarah91 Totally agree. You totally rock, best teacher evar! Keep it up! Everyone sub.

[chucklesthebear]

YOU THA BEST

[Saitame]

9:25 "gives away the atom" you probably meant electron :)

[amishiparikh]

what is meant by ground state orbital?I had a question in my test ,which is the ground state orbital in Selenium(Se)? If u can explain

[socctty]

You're awesome! However, a minor pet-peeve: around 9:35 or so you start saying that the group 1A elements want to give away "atoms" when you mean that they want to give away ELECTRONS. Otherwise, I love your videos - one day I might even like chemistry.

[vickiormindyb]

The guy I lived with was a Biomolecular Chemist.

I went to his lab once and saw all these strange models with sticks and circles fused together.

"What are all those things with sticks and circles fused together?" I asked.

He scowled. Not the way he wanted to think of his work, and said they were molecular structures.

He also said I wasn't supposed to know about them.

It's not like I'd remember anything to tell anybody, but he acted paranoid and wouldn't let me see anything else.

[tDJgut]

This is extremely helpful.

Thank you for taking your time

[Shazaaming]

When you said the general trend with size...at around 14:40 , do you mean the atom radius increases from bottom right to top left?

If the Group 17 elements have a smaller radius than the Group 1 elements in the same period, wouldn't the trend go from top right to bottom left?

[shinoda404]

I agree. If you look at the right-to-left arrow, and the top-to-bottom one, the resultant diagonal arrow should go from top right to bottom left.

[Krealix]

ive decided i love your voice....excellent video its helping me alot with chem

[scissorzaxen]

Wow! I didn't even notice! I heard it as electrons until you said it. The mystery of the human mind... =P

[laputahayom]

it is the the same as this.

(two "the")

[Roh1and]

Nice.

[clerlic]

Great series!

You accidently said atoms instead of electrons a few times. Around 9:20 ->

[Sconz32]

He actually did the same thing a few videos back, except he said electrons instead of atoms. He's just balancing it out.