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From: khanacademy
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  • Wow. Im only 5 minutes into the video, and already just the definition of "atom" leads me on a wild chase through google, I've learned about middle english , old english, and greek, where these words are coming from.

  • Ok I have a question. I always assumed that an electron does have a definate orbit, but because we cannot visually observe it we treat it like a probability so it is easier to plug in mathematical equations. But your saying this as if it is a literal thing. so which 1 is it. Is the Universe really made up of cryptic "everything is everywhere" mumbo jumbo? Or is this just an easy visualization that scientists use so they can work with atoms?

  • Awesome video mind blowing... keep up the good work Sal

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  • that was really cool and helpful. thank you!

  • HEY, this is a really good video.. thank you so much

  • gr8!!!!!!!!!!!!!!!!!!!

    

  • that apple is looks deliciious.. #tempting

  • thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanksthanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanksthanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanksthanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks thanks

  • whats the whole religion talk for!!! :/

  • you r good

  • I'm here because I want to get an A in chemistry! :D This video was really helpful!

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  • in response to the other comments, This is a learning opportunity for alot of people and I appreciate the availability of these lessons and find it disturbing people feel the need to complain about free education.

  • this video froze at 14:11 minutes and I was unable to view the last 7 minutes

  • I never liked atheists too much.

    I mean, I don't believe in any religion, which I guess makes me an atheist, but the people that proudly call themselves atheists are usually touchy douchebags.

    The same goes with theists.

    That's just my experience.

  • @SlipAllCityToy

    You're stereotyping... and be proud you're an atheist. Pride has both negative and positive connotations; if you fear expressing your beliefs will make you seem arrogant, you can always do it in a less pretentious way. Generalizing and calling most atheists/theists (everyone) "douchebags" doesn't help.

    The "why" is the most important, and is what separates the ignorant from the wise. If you don't know why you believe what you believe, you really have no right to criticize.

  • @kohehd

    No.

    It's simply not me.

    I AM PROUD of PERSONAL ACHIEVEMENTS.

    Some people see beauty in intelligent design and that's why they want to live, perhaps.

    "WHY" is because I see absolute beauty in randomcity and things at atomic level, and love learning about them.

  • You wanna hear something crazy? I like to watch this kind of thing when I get a good buzz. I mean I really dig it. But later, I can't remember enough of it! Funny how that works. Oh, and don't think that just because my spelling was good that I'm pretending. I had to hit backspace at least 10 times! lol

  • Yu explain it better than the teachers

  • @sysymatt cells are made of atoms, too

  • Does this playlist cover all the topics on SAT II chemistry? Thanks!

  • What program are these videos made in?

  • your example is wrong an apple have the smallest unit of cell ,

    atoms fond in non living things just like in, iron rod, plastic,air,water,

  • @sysymatt thats really stupid :/ Dont talk about things you dont know about

  • @sysymatt shut up..you dont know what you are talking about

  • Viewed by mostly 45 -54 year olds? In India, we watch this when we're 7.

  • @AlbinJi lol im 17 and i watched this and i all ready turned this

  • witchcraft

  • Good vids, but questions about the atomic weight: If it is a weighted average of the different isotopes, with weightings based on each isotopes abundance on Earth, then:

    1. How can such an accurate number be useful when surely the abundance of each isotope on Earth can surely only be roughly estimated?

    2. Is the weighting based strictly on Earth abundance, no more? And does this include Earths atmosphere as well?

    Thanks

  • this was very helpful, thanks!

  • THNX SO MUCH 4 UR AWESOME VID, NOW I WON'T FAIL MY SCIENCE EXAM

  • I want summa dat fried chiken

  • RELIGION RULES!!!

    chemistry biology and phisics are good to

    EVOLUTION IS CRAP!

  • @TheElolLicious11 Shut the fuck up.

  • biology teaches evolution.

  • carbon numbers are 6 6 6  :0

  • it seems to me like the probability of an electron is less like a comet or a planet, and more like thundercloud

  • Thanks. Great Job explaining it in terms for some of us less able folk. I'm subscribing!

  • Great video dude. Very well put together and explained well too.

  • Fantastic, Just Fantastic.

  • 18:43 You see an infinitesimally small pair of boobs. *Fixed

  • thanks so much i was about to fail my test and this video helped me get an 83% thank you so much!

  • im just gonna rly on my freedom of speech thank you @sesshoumarust and say suck my 2in long 10in wide chode

  • @jdamn321 2inch long _ LOL

  • Takin over

  • I like hown its illeagle to talk shit to him

  • omg that just blew my mind, THanks khan!

  • Well,how do we know there are atoms and how they look when we can't see them even under a powerful microscope?

  • The Truth Has Set Me Free

  • u smell like a used condom filled with jizz

  • @jdamn321 This guy is awesome

  • @jdamn321 how do u know?

  • @Leenybopper cause i fucked his mom last night and used a condom and he was asleep in the next room cause he is a nerd and lives with his mom so i filled my rubber up with jizz went into his room and layed it right across his face so thats how dumb ass

  • @Yuffie3982 read the comments

  • @Yuffie3982 listen troll,stop sending messages to me. I detest retards,just go find your mother and go troll on her pussy.Have a nice life.

  • @Yuffie3982 Why did you even reply? I'm asking if you know anyone personally,and why aren't you dead yet?

  • you people that commented about him talking about religion... what part is that? because i didnt hear anything bias or anything autheist. seriously? he makes more money than you will in your entire life in one video. yeah if he " was" <- i did not see or hear this) autheiest then im still gonna like him... get over your pitiful remarks and fix your failing grade in chemistry!!!

  • @Leenybopper He doesn't make any money from his videos.

  • @RonBurgundy161 he wins awards and those give him money erogo he gets money you crazy athiest!

  • @Leenybopper But that's a different issue, you clearly stated that he makes money for each individual video he produces.

  • you people that commented about him talking about religion... what part is that? because i didnt hear anything bias or anything autheist. seriously? he make more money than you will in your entire life in one video. yeah if he " was" <- i did not see or hear this) autheiest then im still gonna like him... get over your pitiful remarks and fix your failing grade in chemistry!!!

  • Awesome post And I have a question could electrons not even exist and what we call electrons just be a kinda of field or wave produced by protons and neutrons?

  • Do Quantum mechanics please....(thumbs up and re-post on other videos so he can see)

  • The playlist is called chemistry but he talks alot about quantum mechanics?

  • ahaha love this guy

    "imma draw a nice lookin apple so it doesnt just look like a heart"

    "purple seems more like a neutral color"

  • FUCK chem is so hard..

  • I played the snake easter egg while watching this.

  • DUDE STFU STOP WITH THE RELIGIOUS AND ATHIEST PUSSYSHIT NO ONE FUCKING CARES YOU STUPID VAGINAS! HOLY FUCK YOU BUTTHURT LITTLE PUSSYS.

  • @jdamn321 the video rocks deal with it 

  • Great, another vid about physics ruined by religious comments. =(

  • @MrLittletomdj excuse me this is chemisry

  • @kabilan83 I knew someone would pick me up on that... I was coming at the subject from a quantum physics route (understanding atoms, particles, quarks, bosons etc.). This is pretty much the bridge between the two sciences, but yeah the periodic table and chemical bonds; definately chemistry! Can I be forgiven?

  • @MrLittletomdj i agree..but just to let u know, its chemistry buddy

  • @allriseblue Please refer to my response, written two months ago to kabilan83 ..

  • @MrLittletomdj Great... 19 morons who are bugged by imaginary friends they don't believe in o.O

  • @seatsbackcadillac It's not the God that bugs us it's the fucking religious people.

  • @MrLittletomdj Respect everyone by judging no one. Athiest assholes and their religion bugs me more then the other crazies. Everytime I turn around one of you is crying MOAR about one thing or another. Wake up and realize you're here to observe and that doesn't require belief/judgement.

  • @seatsbackcadillac I made a critique of a debate that I believe doesn't belong on this vid (thus I won't respond again). You called 19 people morons & assholes then got pissy when I judged you the same way. That makes you a hypocrite. Then you called Atheism a religion which is just wrong. I'm not just here to observe, I'm here to evaluate claims & learn, which does require belief & judgement. So wrong on all counts, if you want an arguement do it on another vid or my channel.

  • how did you write thw word "uncuttable" so well? i'm guessing you're using a pen for the screen instead of a mouse.

  • Religion is stupid. You can see just from the comments how human nature uses religion to fight about everything. Stupid. It's a waste of human potential. This is a video about chemistry. Take your rants elsewhere.

  • at 17:40 he sais he wants to tell us about the neatest thing about atoms...

    ...and then he draws two boobs: 18:35.

  • Please khanacademy, remove all the comments below.

    To the viewers, flag it all as spam. Sorry for ruining this amazing video.

  • and i see that the oldest scripture and not an assumed religion is Hinduism.that says 3000B.C. It is considered the mother of all religions ,the second oldest being Judaism. Your false claims are an act of gibberish mind left alone to graze on a paddy field filled with insects...The right fertilizer needs to be used to get rid of your thoughts...I give a damn what religion anyone belongs.Humanity is the biggest of all and religious fanatics like youdeserve no less than life term imprisonment..

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  • This Vid is great

    thanks so much in doing it

  • Thanks a lot teacher khan, but how did they counted the number of proton ? and then assigned that number to a certain element?

  • Otherwise, this is indeed a very good video, I hope everyone in places where education is inaccessible and of very low content are able to see these videos

  • If your religion forces 8 year olds to marry their grandfather then there is something very wrong and sick with it...

  • @ComandanteG

    omg dude who the hell told u that islam does that

  • very nice and full of information thank you for posting this

  • @gulfland If there is a hell... I'll see you down there. Saying who goes to hell and who does not... Why don't you just tell people to die and burn in hell. Sometimes I'm glad there still is religion so people like you don't start killing and raping people for no reason because "there is no god so there are no consequences". If you are a good person just shut up and move on and I'll say I was wrong IF there is an after life and I'm in hell.

  • @gulfland Oh one more thing, it's a big f@cking IF.

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  • @AncientAeon the original languages of the Bible have all been dead languages for centuries and the documents themselves have been lost in their originals for hundreds and thousands of years. So, how could it be that something like this could be so easy to preserve and to recite from cover to cover.Yet,

    Quran Has Only ONE Version And Still Exists. Quran had been memorized by thousands of people, in it's entirety and is scattered about the earth in many different countries. Wake up!

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  • @AncientAeon LOL , If the bible had only one veersion,then why "the bibleS" contradict each other about Jesus, the son of Mary, peace be upon him,?!!!!!!!!!!!!!!!!!!!!!!!!!­!!!!!!!! one bible says that jesus is NOT God, which is absolutely correct, yet, another bible claims falsely that Jesus is God, and another one claims falsly that jesus is the son of God!!!!!!!!!!!!!!!! be raaaaaaational! May God Protects you from the whispers of Satan, and Gathers me and you in Paradise.

  • @gulfland stop bow bowin and search ''History of the Qur'an'' in wikipedia...You are lying...

  • @retipser dying of envy, eh?

  • @gulfland envy???haha,I can prove with the same amount of research and with the same authority as you seem to hold that anything that exist as religion is man made...prove me wrong...What happened to the Jews of Medina?You should see no colonialism, racism, or so-called "Islamaphobia" in submitting Islamic practices to criticism or condemnation when they violate human reason or rights.

    Quran 9.29 "Fight those who believe not in Allah nor the Last Day ... "what does this mean

  • @retipser how ignorant you are! Prophet Mohmmed fought the Jews because the broke the covenant between the Jews and Muslims. WHY DON'T YOU ASK YOUSELF WHY HITLER KILLED THE JEWS!

    ( I.E THE HOLOCAUST)! THT'S BECAUSE THE JEWS ARE DISHONEST, AND ALWAYS BREAKING THE COVENAT! SEE HOW BLIND YOU ARE! EVEN NON-MUSLIMS HATE JEWS. GO TO PALESTINE AND SEE WHO ARE AGAINST HUMANITY! SEE HOW BLIND AND HOW YOUR MIND IS STUFFED WIH BULLSHIT!

  • @gulfland hehe,you and your religion sentiments and extremism makes me blind .what covenant are you referring to SIR? Hitler killed Jews(6 Million of them) and 'millions(non-jews)' because of their progress and dominance,you twisted mind will think terror all the time. Why don't u ask yourself why Hitler committed suicide . Read this book ''Table Talks", a collection of monologues..Don't talk stupid again.let allah bless you with sanity

  • @gulfland Bad influence that is,more gore and blood !IMO

  • @retipser LOL, This has proven my point that you are really dying of envy! Michael Hart's book is about POSITIVE people,Here is aqoute from the author himself:

    "My choice of Muhammad to lead the list of the world's most influential persons may surprise some readers and may be questioned by others, but he was the ONLY man in history who was SUPREMELY SUCCESSFUL on both the religious and social levels"

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  • @gulfland Honestly,you sound like anyother religious extermist ..So,you live with your religion/prophet/Michael H,I will live with my religion aka Humanity. by far the most non-violent preaching that was ever known to this earth was Buddhism and offshoot of Hindu(not a religion). second to that was Jainism. They dont even harm an ant.

    A religion that preaches non-violence and follows non-violence ,i respect it,else my 2 cents to other religions and religious fanatics like you are 'never mind'

  • @retipser

    oh my ...

    how strong is the thing wrote in wikipedia u make it looks like words from god not able to modified anyone can write anything without a 100% prove

  • @BlackMage79 exactly my point,anyone can 'write' anything.

  • @retipser

    yeah but Qur'an isn't on the internet or on wikipedia

  • @BlackMage79 where is it?who is the author...what are you trying to prove that Islam is great,allah is the only god and everyone should follow him...With all due respect,where Islam is folllowed,exist mayhem...you can see around for yourself...it can be a pure coincident,but when people start thumping their chest and talk about religion,i just draw a line and tell them thumbs down..thanks..

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  • @retipser mayhem doesn't exist where islam exist , mayhem exist when some terrorist maniac hate Muslims and make problems and pretend to belong to Islam.

    u can find what happen when islam exist here .... > watch?v=JZDe9DCx7Wk <

    that what Muslims really gave to the world , not mayhem as u say

  • @BlackMage79 I agree to you(partially),what the forefathers gave and what is followed is totally different.

    Allow me to say that I am against the ones who have twisted the scriptures to their advantage,who have used the preaching to create violence and bloodshed. Any religion 'should' not tolerate violence and loss of life due to its own religion or for religion. Humanity should reign over everything else. good deeds should lead the way, co-existence exist by nature and not by religion.

  • @retipser

    "what the forefathers gave and what is followed is totally different."

    so what if a generation sucked up . that doesn't mean the religion sucked too

    "co-existence exist by nature and not by religion"

    religion ease the way to co-existence , nature tells us the there is no rules the only rules that the strong beat the weak and the weak beat the weaker

    but religion or my religion tells us that the strong should be kind on the weak and the weak respect the strong

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  • @BlackMage79 I am sorry,it's subjudice to say nature says that and says this. Even animals tend to their little ones,not by religon,they belong to different specie & so r human beings. Religions is a set of rules made by human beings and forced upon a few,which eventually led to divide.And i hate what it created at the end. We are all hyypocrites and we deserve it. And when people thump their chest to prove their religion is great,it onlyshows thestooped levles ofhuman beings.Ihateviolence

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  • @retipser

    as far as i know no religion should lead to violence,the best thing about my religion that it's not just how to deal with god , it is a way of life , how can we be merciful to others in and out our religion,if i talked about myself . sometimes i shout at my friend when he tries to kill an ant or to hurt a dog

    my religion tells me that i should be merciful to even animals not just human,how can i be mecyful with animals and violence with humans

  • @retipser

    "it's subjudice to say nature says that and says this. Even animals tend to their little ones"

    how can u say that , we all know that there is a food chain in the animal kingdom u can't say u saw a lion feeding a deer

  • @BlackMage79 Nature didn't permit stoning another humanbeing as part of punishment,but religion did.

    Nature didn't set rules ,but the survival instincts did. Today, people are identified using religion as a tool. With regards to this video for example,there is proton,there is neutron and there is electron.

    So,i believe,there is good,bad and neutral standpoints when it comes to religion. Somewhere,beyond cosmic lies the answer. Big Bang followed by Big Rip will concludethings IMO.

  • @retipser You are a moron.Which religious person you know would murder someone?You're acting like killing alone brings this world down.What about lying,cheating another ,what about brain washing people? what about corporations fighting to ruin the rights of common man?Listen you moron,a group of people doesn't define the whole.If we looked at it like how you look at it,we would see everyone as evil.You're sick and you need to resolved your mass blaming.

  • @sesshoumaru3st To begin with, for u to be here now zillions of drifting atoms had somehow to assemble in an intricate and intriguingly obliging manner to create u. I second you on one thing,that is calling me a MORON. If I do not agree to your wise thoughts,the equation will change. There is always a degree to everything that we follow and its effects. When i say goodbadand neutral,it includescivilized people like you & MORONs likeme. 'Killing' indeed is the end. respect to your wise thoughts

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  • @AncientAeon You are fooling yourself! why are you running away from the subject of the position of Jesus in the bible? the contradictions are crystal-clear and has NOTHING to do with interpretations because the message the the bibles convey is DIFFRENT! one bible says that jesus is NOT God, which is absolutely correct, another bible claims falsely that Jesus is God, and another one claims falsly that jesus is the son of God! Remove the blindfold of foolishness from your eyes and be rational!

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  • @AncientAeon At last, you asked for it, and that's exatly what I want: Here is a serious contradiction that destroys christians belief: 1- There is but one God [Deut 6:4] which means jesus is a messenger of the Creator of Heavens and Earh. 2-There is a plurality of gods [Gen 1:26 / Gen 3:22 / Gen 18:1-3 / 1 John 5:7] which FALSLY claims that jesus is another god! This, of course, would lead us to a discussion of the Trinity. I think you are afraid to talk about this FOOLISH issue!

  • boss tits at 18:40!

  • perfect teaching

  • Fyi this is GREAT teaching it's a lot more clear and understandable than the way they rushed through this stuff in the university I now owe the government thousands of dollars for attending (and not learning well) [Depaul University - Sorry miss whateverthehellyournamewas that I neglected to remember because your teaching methods were very expository]

  • Nevermind As I'm watching he's explaining that ^^ thx

  • I don't get some of it. Can someone explain in more detail how they know they can't cut an atom if it's an abstraction and we can't really 'physically' observe it (i mean, take a picture)? By what means do we 'observe' an atom if we can't see it?

  • OMG!!! THANK YOU SOOO MUCH

    YOU HELPED ME SOOOO MUCH I LOVE YOU

  • A neutron walks into a bar. "how much for a drink here anyway?" to which the bartender responds, "for you, no charge."

    Two atoms are in a bar one says "i think i lost an electron" the other says, "are you sure" to which the other replies, "i'm positive"

  • so much information it huurts! im only in sixth grade!

  • Hey Apple!

  • I don't get it, why they are using protons instead of neutrons in the hadron collider?

    Aren't neutrons heavier ? And also... having no charge they wouldn't repel each other and that would make the collision easier...

    ... ain't that right?

    Anyone care to explain?

  • @GShock112 Shit just got real.

  • this introduction is awesome, sal tells you in the beginning that viewing the electrons as a particle can be misleading. in middle school we were taught that electrons are particle that spin around the nucleous, and that electricity is due to their mouvement from one end of the metal to the other, and then when studying quantum mechanics, they basically tell you that electrons are like waves, they perform quantum jumps, only have a probability of being some place...the subatomic world is crazy.

  • i am very religious and i still like science.

  • Charlie sheen is biwinning. Sal is infinitely winning like a bosses boss.

  • ATTENTION people.

    ATHEIST & THEIST

    can you s...t...f..u & stop arguing?

    THANK YOU.

  • Attention all religious nutjobs: Religion is like a penis. Keep it to yourself. This is a video about SCIENCE. This is NOT a video about religious junk science such as intelligent design and pantheistic theism. Therefore keep your religion and theism (all kinds) to yourself. Me and other people came to this video to learn FACTS that are supported by EVIDENCE, not your superstitions. Thank you

  • DEAR VIEWERS,

    FOR ASTONISHING FACTS, JUST TYPE IN THE SEARCHING BOX:

    Quran and Science

    SEVEN PARTS!  YOU MUST LIKE THEM!

  • @gulfland

    You mean junk science. There is no science in the quran. If you think that there is then you have no damn clue what science is about

  • @SexyArcanine666 INDEED, the scientific miralcles of the Noble Quran is ONLY for men of understanding,

    NOT for men of stupidity like your case!

  • @gulfland

    So you are spamming this video with more bullshit? I understand that your book is a set of fairy tales with no scientific or intellectual value.

  • @SexyArcanine666 Remove the blindfold around your eyes and It's garanteed that you will see the Light of the Noble Quran! Indeed, the scientific miracles of the Book of God is ONLY for those of understanding, Not for those of stupidity like your case! That's why God Created Paradise and Hell-Fire!

  • @gulfland

    LOL. Remove the blindfold of faith from your eyes and see the, that is the light that took 12 billion years to get here which proves that the universe existed for billions more years than your ancient book if shit says

  • @SexyArcanine666 you are like a goat-herd, if one were to shout to a goat-herd, that hears nothing but calls and cries. How deaf, dumb and blind you areThat's why you never understand!

    . WEATHER YOU BELIEVE IT OR NOT, MUSLIMS, CHRISTIANS, AND JEWS ALL AGREE THAT ATHIESTS ARE THE MOST STUPID CREATURES IN THE WORLD WHEN IT COMES TO RELIGIN!

  • @gulfland

    Don't say I am stupid when you can't even spell. Therefore unless you can prove it, STFU

  • @SexyArcanine666 sorry, you are an idiot.

  • @gulfland this is funny...i would rather die not thinking of heaven or hell or jihad...religious psychos have ruined this world...

  • @retipser You can Choose your path to Hell, it's up to you!

  • @gulfland If you had little sense ,i never said i would choose HELL or for that matter Heaven(you see the 'matter' there)..dont' twist my comments for your sake...You are speaking at your convenience and limited thoughts...which itself shows you have a boundary around you and i dont' expect you to see beyond...Cheers and end of conversation with 'YOU'...

  • @retipser the problem is It's TOO deep for YOU to ever understand! your reactions imply that you are on the way to Hell! Watch your reactions before It's too late to choose your path!