Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App! Download it here for Apple Devices: apple.co/3d4eyZo Download it here for Android Devices: bit.ly/2SrDulJ
+MODERN MUSE Your chemistry teacher would have time to put together awesome presentations like this. Mostly because your chemistry teacher wouldn't have the production staff and kick butt animators.
I've already learned all of this but this does help me review and it's interesting to watch the history of the Atom especially with the elegantly animated graphics
I love this episode! I have always liked 'the history of things' like this. It's not atomic chemistry its the history, the story of how we went from A to B to C to D and finally F.
wow... Hank went through all the names, experiments and mathematical concepts of atoms, which I learnt for the past 15 years, in less than 10 minutes... Very impressive..
+Isaac Lee Your teacher either sucks at teaching, or doesn't understand the material him/herself. Unfortunately this does not necessarily get better with college. It's a good thing you sought out other sources of educational material. Don't assume your teacher is a genius.
I love this episode. I always seem to get my science lessons as a series of conclusions with no clue how scientist arrived at these conclusions. I really appreciate this walk through how they developed the atomic model.
I feel that if I watched every video this dude's produced I could graduate in no time. Like seriously, this guy's covered so much, I've been asked to watch his videos for class so many times. I probably know this guy better than some of my teachers and classmates.
Crash Course Biology > Crash Course Chemistry > Crash Course Physics > Crash Course Mathematics > Crash Course Formal Logic > Crash Course Philosophy > ??? Theology? Also, we need John to make Crash Course Economics, Crash Course Sociology and Crash Course Psychology, to close the gap at the other side of the spectrum.
I think Thomson's methods of measuring the mass so many years ago were not very accurate - so his estimate of 1/1000 x an H atom was not so bad, considering. But you are right, electrons are approx. 1/1800 x an H atom.
You are right I know I'm 4 years late and many others have answered but yes J.J's first measurement WAS 1/1000 but later chemist corrected the measurement to about 1/1840ish kind of disappointed hank didn't correct it but oh well I doubt it would end you on a test unless it's very specific but still
I was taught that Rutherford expected most of the Alpha particles to be reflected because the plum pudding model implied that atoms were solid mass with negative charges dotted around. Anyone care to explain the confusion?
This is so weird. I was doing some Chemistry homework on the Atomic Theory, and I got inspired to watch some "Crash Course: Chemistry" videos. So I opened up the RUclips channel, and the first thing I see, is this video. Awesome! Thanks Crash Course for all your videos. I really like watching these videos so I hope you keep it up with the video, I'm also looking forward to watching future series. Thank you, and have a nice day!
This is great! I love all the animations. The only negative thing I have to say is he talks too quickly. I feel it would be hard to follow for someone who has no background knowledge of chemistry.
Hmm.... Wasn't it more Shrodinger's theory who predicted electron probability densities, nodes, etc., while building off of Hiesenberg's uncertainty principle (excuse the spelling on their names if I'm wrong, by the way...)
I think what he meant is that what you call plus and what you call minus is a matter of convention, and that out of two choices we picked the more inconvenient one.
My science 8 class teacher gives a lot I mean a lot of cringey animated videos and this once he gave a video I could watch without cringing so good vid :)
You can't think of them as either only particles or only waves, they're always kind of both. They spread like waves and hit like particles, which is why they can be confusing to understand. It's easier to sometimes talk about either one or the other, but it's technically wrong. Sound is a completely different thing, it's just that they're both waves, so we talk about their properties in a similar way. One is waves of electromagnetic fields, the other is waves of pressure, or movement of atoms.
Schrödinger's contribution is more or less necessary to derive the orbitals(the n quantum number) from coloumb's law. However, you can still get pretty far with the Heisenberg picture, if you input the energy levels from Rydberg's formula by hand and use spherical symmetry to show that the Hamiltonian commutes with the orbital angular momentum, and then assume it also commutes with electron spin. With this you can actually derive the correct degeneracy numbers for the energy eigenstates.
oh my god, i just discovered this channel and I’m soooooo happy. My chemistry teacher is really good, but u have a completely different way of explaining things, it’s almost like I’m not studying. Thank u soooo much for those videos, u r amaaazing!! (if there r some mistakes, sorry, I’m from Poland)
Thank you so much for a great presentation!! first major discovery that set off modern atomic theory was that atoms aren't in fact the smallest things that exist. J. J. Thompson discovered the electron in 1897, which led him to posit a “plum pudding” model .
Leucippus' model is not blind guessing. He used the available resources for observation and generated a reasonable model to describe the nature and anticipate future behavior.
I love science because of things like this. Science is never exactly right. It's only ever mostly right, and it accepts this fact. Everything that comes along is allowed to be put to extreme scrutiny until it is proven wrong. In fact, this is encouraged. SCIENCE! We only say we are right, because we don't know why we are wrong yet.
because the alpha particles are moving very fast, with the target atom's mass hypothesised to by the plum pudding model be evenly distributed, the analogy was "as if you fired a 15-inch shell at a piece of tissue paper and it came back and hit you,” (direct quote from Rutherford)
Love your videos, unfortunately every time I try to share them with my students the majority of the class complains that you talk too fast. Everything is so well done, I wish they were more friendly for a wider audience.
Hey what if you can take a picture of an atom on an atomic scale from light years away? Could you the freeze frame the images? or is it possible to snapshot an atom from a sufficiant distance. A distance that allows you to see an electron without disturbing it?
Halloween was yesterday, its November 1st, my family is blasting Christmas music, drinking eggnog, and dancing... the *FREAKING TREE IS ALREADY UP!!!!!!!!* >:C
Hank, wanna do a history of science? Currently taking a class on Darwin. I am no science major, but I love learning about science and especially the history of it. It would be a great service to pupils of all ages and the scientists of the future. (Future scientists. Isn't that a neat thought?)
*In the Rutherford experiment, he didn't expect the alpha particles to go straight through. They were positive and so was the atom's emitted charge which means he expected them to repel. Them going straight through showed that there was a lot of empty space.*
There's more chemists he didn't mention; Millikan who discovered the mass of the electron with the the oil drop experiment, and Chadwick who discovered the neutron
Man, it's kind of astounding how much smarter these guys were than most of us, even without the prior knowledge of the structure of atoms and their parts. Like, how the heck did they come up with these experiments, and then interpret the data?
One thing you should have mentioned about the cloud model is that it is a probability distribution of electrons and the orbits are the area of only 90% of the probability as there is a very small (non zero) chance that an electron can be infinite distance from the nucleus.
Hello, past humans I am from the distant future, I saw this video in the archives and wanted to tell you that there have been new discoveries in my times. Since 2057, we know that atoms actually consist of 8 different types of particles. Good luck
+Oogie Boogie 6 types of quarks leptons gluons muons electon neutrino tau photon and then there are also the 3 (?)bosons and there are more of them but they exist temporarily
manooooooo, já muito é muito complexo estudar química e ainda um vídeo em inglês e legenda em espanhol. Eu não sou fluente em nenhum dos dois idiomas, Please subtitles in Portuguese !!!
Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: apple.co/3d4eyZo
Download it here for Android Devices: bit.ly/2SrDulJ
Now we won’t fail chemistry 🗿
Teeny tiny correction for y'all! At 8:50, we misspelled "Heisenberg" as "Heisenburg." Sorry for the mistake!
who else has a chem test coming up
tmr
Me!
tomorrow
Same
lmao I didn’t pass mine
if this guy was my chemistry teacher I'd be getting amazing grades
yes
+MODERN MUSE I wish!!
+MODERN MUSE Your chemistry teacher would have time to put together awesome presentations like this. Mostly because your chemistry teacher wouldn't have the production staff and kick butt animators.
WORD11
OMG same! My teachers name is legit Mr stoner
Whos watching this in quarantine 2020 becuase school dont help that well
For myself:
2:15
3:13 JJ Thompson
4:21
5:31-planetary model
name is actually spelled JJ Thomson
I need this dude as my chem teacher, I'll be getting grades higher than Jin's confidence in his looks
Yup and that's my co-Army right there💜💜💜💜
yep. you really do man.
@@howelsimos2088 and that's my co-coArmy right there
same
the way i had the exact same thoughts while watching the video... armys really do share brain cells
I've already learned all of this but this does help me review and it's interesting to watch the history of the Atom especially with the elegantly animated graphics
Einstein just steals Bohr's tea at 5:45 WTF Einstein
Jajamola888 I guess Einstein was bohr-ed... GET IT?!
K i go now
+Tanishq Desai noicce
YEA!!! :O
That's so savage. He can afford tea. GO GET YE OWN TEA EINSTEIN
See my surname
My chemistry teacher if you are reading this please resign
lmaoo
Lol what I feel about my teacher
My chemistry teacher used this
I'd be happy if mine just played these videos and tested us on it.
@@alishamarte9963 sam3
I love this episode! I have always liked 'the history of things' like this. It's not atomic chemistry its the history, the story of how we went from A to B to C to D and finally F.
Raise your hand if you came here for the science assignment.
LOL EVERYONE HERE FOR CHEMISTRY WHILE IM STILL WONDERING WHY THIS IS IN OUR PHYSICS LIKE WTF
JOHN Dalton, not JAMES Dalton
2:15
Joe Zhang Lol XD
james is a nickname
Glad I'm not the only one XD
It might've been a Harry Potter "James Potter" joke
you don't get the joke xD
I need this guy as my teacher, my teacher only sits on her desk and reads what’s on her PowerPoint
wow... Hank went through all the names, experiments and mathematical concepts of atoms, which I learnt for the past 15 years, in less than 10 minutes... Very impressive..
This might be an old video, but this saved me... BIG TIME! Thanks for the info! I learn more from Crash Course than my teacher at school!
+Isaac Lee Your teacher either sucks at teaching, or doesn't understand the material him/herself. Unfortunately this does not necessarily get better with college. It's a good thing you sought out other sources of educational material. Don't assume your teacher is a genius.
my teacher does suck....so true that
*than, I bet your english teacher sucks too.
alright.ill fix it lol. At least i see my mistake XD
I love this episode. I always seem to get my science lessons as a series of conclusions with no clue how scientist arrived at these conclusions. I really appreciate this walk through how they developed the atomic model.
You did not mention Schrondinger?????????????
His formula gave rise to those s p d f models
It was more Schrödinger than Heisenberg not even a mention?
***** Did daddy feel offended....??? I was just pointing out idiot
Rajit Roy Also no mention of Milikan, Chadwick or De Brogli? maybe the're just not as important.
Hey dude these videos are great for learning because you add humour but are still to the point, they help me understand better while learning at home
What about James Chadwick and the discovery of the neutron?!
***** I wish I could however I don't have a job or money to do so
+Steph Berry Dis is tru
Steph Berry sssssh we don't talk about him
Exactly what i was wondering... Apparently its not important enough.
@Adriteyo Das different person
JAMES Chadwick cane after Bohr
I feel that if I watched every video this dude's produced I could graduate in no time. Like seriously, this guy's covered so much, I've been asked to watch his videos for class so many times. I probably know this guy better than some of my teachers and classmates.
Crash Course Biology > Crash Course Chemistry > Crash Course Physics > Crash Course Mathematics > Crash Course Formal Logic > Crash Course Philosophy > ???
Theology?
Also, we need John to make Crash Course Economics, Crash Course Sociology and Crash Course Psychology, to close the gap at the other side of the spectrum.
Your prediction was close
TapOnX and law
I love a chemistry teacher teach like this. Plus his Save Ginny Shirt. HAHAHAHA
u mean gaaaaaaaaaaaaay shirt
I am studying chemistry at the moment and i was taught that the cathode rays weighed about 1/2000 of a hydrogen atom instead of arround 1/1000
I think Thomson's methods of measuring the mass so many years ago were not very accurate - so his estimate of 1/1000 x an H atom was not so bad, considering. But you are right, electrons are approx. 1/1800 x an H atom.
There's probably a good amount of different numbers, probably in between 1/1000-1/2000, but I'm not sure so don't quote me on that
You are right I know I'm 4 years late and many others have answered but yes J.J's first measurement WAS 1/1000 but later chemist corrected the measurement to about 1/1840ish kind of disappointed hank didn't correct it but oh well I doubt it would end you on a test unless it's very specific but still
Ummm.. it's 1/1730
That's what has been taught in my class
I was taught that Rutherford expected most of the Alpha particles to be reflected because the plum pudding model implied that atoms were solid mass with negative charges dotted around. Anyone care to explain the confusion?
This is so weird. I was doing some Chemistry homework on the Atomic Theory, and I got inspired to watch some "Crash Course: Chemistry" videos. So I opened up the RUclips channel, and the first thing I see, is this video. Awesome! Thanks Crash Course for all your videos. I really like watching these videos so I hope you keep it up with the video, I'm also looking forward to watching future series. Thank you, and have a nice day!
it was very interesting to see the development of the atomic model! thanks for the video and keep up the amazing work!
This is great! I love all the animations. The only negative thing I have to say is he talks too quickly. I feel it would be hard to follow for someone who has no background knowledge of chemistry.
It's a crash course, it's meant to be a review rather than an introduction to an subject.
Try playing at slow playback speed
@@dinimasharma3549 thx for the tip! I just adjusted mine.
It’s so cool that people who lived such a long time ago can influence what we know today!
This was made 3 years ago and we're just about to learn about this in class
Hmm.... Wasn't it more Shrodinger's theory who predicted electron probability densities, nodes, etc., while building off of Hiesenberg's uncertainty principle (excuse the spelling on their names if I'm wrong, by the way...)
thank you for summarizing an entire college chem reading that now I don't really have to do :)
I think what he meant is that what you call plus and what you call minus is a matter of convention, and that out of two choices we picked the more inconvenient one.
My science 8 class teacher gives a lot I mean a lot of cringey animated videos and this once he gave a video I could watch without cringing so good vid :)
You can't think of them as either only particles or only waves, they're always kind of both. They spread like waves and hit like particles, which is why they can be confusing to understand. It's easier to sometimes talk about either one or the other, but it's technically wrong.
Sound is a completely different thing, it's just that they're both waves, so we talk about their properties in a similar way. One is waves of electromagnetic fields, the other is waves of pressure, or movement of atoms.
2:16 that harry potter reference.
I wish he was mine
He is really divine
The hero who conquered the dark lord
He was probably pretty terrible in the bed.
Schrödinger's contribution is more or less necessary to derive the orbitals(the n quantum number) from coloumb's law.
However, you can still get pretty far with the Heisenberg picture, if you input the energy levels from Rydberg's formula by hand and use spherical symmetry to show that the Hamiltonian commutes with the orbital angular momentum, and then assume it also commutes with electron spin.
With this you can actually derive the correct degeneracy numbers for the energy eigenstates.
You, my friend, are amazing, Thank you for helping me get through Year 11 and 12, or as Americans may call it, Junior and Senior year.
+Reuben Wallace-Gibb (Spirit of Harmony)
Lol
MY TEST IS TOMORROW OMG CRASHCOURSE YOU GOD LIKE HELPFUL PEICE OF BEAUTIFUL GOLD, YOU!
oh my god, i just discovered this channel and I’m soooooo happy. My chemistry teacher is really good, but u have a completely different way of explaining things, it’s almost like I’m not studying. Thank u soooo much for those videos, u r amaaazing!! (if there r some mistakes, sorry, I’m from Poland)
This is kind of a long shot but you guys should consider doing something like history of science. I really enjoyed this video
Thank you so much for a great presentation!! first major discovery that set off modern atomic theory was that atoms aren't in fact the smallest things that exist. J. J. Thompson discovered the electron in 1897, which led him to posit a “plum pudding” model .
Leucippus' model is not blind guessing. He used the available resources for observation and generated a reasonable model to describe the nature and anticipate future behavior.
Good video overall though- atomic theory gets pretty awesome when you can apply its principles to like 6.02*10^23 atoms.
Really cool vid, but please don't ignore Bohr's contributions to quantum theory.
his name was JOHN DALTON, you missed that but the rest is freaking cool
raise your hand if you're cramming for a test you forgot about
2:15 its John not James dalton (said it as James dalton)
I love science because of things like this. Science is never exactly right. It's only ever mostly right, and it accepts this fact. Everything that comes along is allowed to be put to extreme scrutiny until it is proven wrong. In fact, this is encouraged. SCIENCE! We only say we are right, because we don't know why we are wrong yet.
Anyone here from Ms. Perez’s class?
P.S.: Ms. Perez if you’re reading this, hi, hope you’re having a good day 👋🏼
I never knew that the Greeks thought that there were different atoms depending on the material, such as clay or cheese!
"And cheese atoms are squishy and delicous"
because the alpha particles are moving very fast, with the target atom's mass hypothesised to by the plum pudding model be evenly distributed, the analogy was "as if you fired a 15-inch shell at a piece of tissue paper and it came back and hit you,” (direct quote from Rutherford)
Love your videos, unfortunately every time I try to share them with my students the majority of the class complains that you talk too fast. Everything is so well done, I wish they were more friendly for a wider audience.
To Tell the truth RUclips teachers are are more better than normal teacher!
0:23 They developed it with the Pythagorean Theorem, Zeno's paradox and the Golden Ratio 😂😂😂
(A reference to AC Odyssey)
bless this video im in junior high (my last year) and we're learning about atomic theory and the different models
Love the somewhat subtle Breaking Bad reference
Hey what if you can take a picture of an atom on an atomic scale from light years away? Could you the freeze frame the images? or is it possible to snapshot an atom from a sufficiant distance. A distance that allows you to see an electron without disturbing it?
"Hank is a mass of incandescent gas" (1:47) hahaha
I think this would have been a great introductory episode.
What do you guys use for editing and animation?
This is already a history of science (that is a major part of the videos)
Halloween was yesterday, its November 1st, my family is blasting Christmas music, drinking eggnog, and dancing... the *FREAKING TREE IS ALREADY UP!!!!!!!!* >:C
Broken Strategy Clan oh my, your like tho only other recent comment here rn
exactly what I needed to end the day - thanks CC
How come whenever they show a historical figure's face they color it like an oompa loompa
Would have been great if you would have mentioned Chadwick discovering neutrons. pretty good video anyhow
What school do you teach in?! I am willing to move!
He is an actor
WTF, he has a B.S. in Biochemistry
@ Crash Course there is some scientists you forgot that also had an impact on the atomic model as we know today e.g. Robert Boyle and Henry Becquerel
The mark... Are you....
Dalton : yes I am the goddamn Harry Potter !!!
Hank, wanna do a history of science? Currently taking a class on Darwin. I am no science major, but I love learning about science and especially the history of it. It would be a great service to pupils of all ages and the scientists of the future. (Future scientists. Isn't that a neat thought?)
*In the Rutherford experiment, he didn't expect the alpha particles to go straight through. They were positive and so was the atom's emitted charge which means he expected them to repel. Them going straight through showed that there was a lot of empty space.*
You are the best teacher ever
"I am the one who knocks" :D
🎉🎉🎉 Thanks so much! Great explanation!!
Literally learned more in this video than I did in my junior year chemistry class.
There's more chemists he didn't mention; Millikan who discovered the mass of the electron with the the oil drop experiment, and Chadwick who discovered the neutron
Thank you soooooooo much.... this was sooooo damn helpful:):):)
it wasn't for me thats for sure :/
Hailey Jeong
Same 😂😂😂 he talks like rapper
And they explained too many sections in one video I think it’s too much
monisha elangeswaran u r mad u thanks him ..........
the vedic books are the oldest and even more advanced than today when it comes to science
Man, it's kind of astounding how much smarter these guys were than most of us, even without the prior knowledge of the structure of atoms and their parts. Like, how the heck did they come up with these experiments, and then interpret the data?
Breaking bad reference
One thing you should have mentioned about the cloud model is that it is a probability distribution of electrons and the orbits are the area of only 90% of the probability as there is a very small (non zero) chance that an electron can be infinite distance from the nucleus.
what about Aristotle? i know he was wrong but mention him at least
Because he didn't have any noticeable impact on atomic theory, unless you count making it harder to accept.
Urja Kohli It's a good thing John did not see your comment.
seriously?!😂
'properties of both... and neither'. This is why Chemistry and Physics is so cool.
Hello, past humans
I am from the distant future, I saw this video in the archives and wanted to tell you that there have been new discoveries in my times. Since 2057, we know that atoms actually consist of 8 different types of particles. Good luck
there are more than 8 kinds of particles in atoms and we've known that for like 40 years mr time traveller :)
+kotzzz9 name them
+Oogie Boogie 6 types of quarks
leptons gluons muons electon neutrino tau photon and then there are also the 3 (?)bosons and there are more of them but they exist temporarily
+kotzzz9 would you like me to look up in the archives when the world ended?
+Oogie Boogie yeah man that'd be cool
Helped me a ton! Thanks!
Cheese particles :)
Suggestions for the future of Crash Course:
John- Politics/Government, World Religions, Economics
Hank- Physics, Astronomy, Computer Science
7:58 Super Mario bros reference!
I'm taking AP chem this year and you have no idea how much the crash course chemistry videos help me, seriously thank you
Did anyone else get the Game theory reference? (At least i think it was a reference)
where
"But hey, it's just a theory." somewhere it was in there. :3
i would love to be using corpusclicity why did we change it??
michael benzur It sounds so freaking awesome!
When James Dalton=John Dalton ? hahah
this is way more simple and quick than the vid we were assigned to watch
manooooooo, já muito é muito complexo estudar química e ainda um vídeo em inglês e legenda em espanhol. Eu não sou fluente em nenhum dos dois idiomas, Please subtitles in Portuguese !!!
I have a chem test tomorrow and this just HELPED ME A LOT
cool graphics but he guy is talking too fast for a high school student to have a chance of really understaning what is going on!!!
A high high school student....
Really not that difficult man...
Darshan Shah In fact not at all difficult.
I do not mean oral comprehension here... I'm talking about understanding the implications, and having time to compensate.
We do understand what you meant, and our reply was intended towards the understanding and not the speed at which he speaks. Chameleon59100
if only my chemistry teacher could explain like this
+salar putros tell you teacher and your classmates to search youtube.
James Dalton? Why Hank, why?
***** For the glory of Satan of course.
FOR THE GLORY OF SATAN!! :P :D Hee hee!
+Steven Hu Hail Satan!
keep up the fast work. More info in less time love it