2. Atomic Structure

MIT 5.111 Principles of Chemical Science, Fall 2014
Instructor: Catherine Drennan

The backscattering experiment of Rutherford is recreated in the classroom setting. Ping pong balls are used to represent alpha particles and Styrofoam balls connected to a series of strings represent nuclei in a piece of gold foil.

License: Creative Commons BY-NC-SA

[petemiller]

I feel like when I was in high school and college, my brain wasn't developed enough yet to appreciate or be interested in this stuff. I saw these sorts of courses as "work" to suffer through. But now that I'm in my 30's, I finally have the attention span and the interest to learn these things. Unfortunately, I am no longer in college, and have a boring 9-5 job. Thank you MIT and YouTube for making this material available so I can at least enjoy it on nights and weekends!

[inversnone]

Just repeating the plain obvious, but can't express how glad I am that MIT offers this HQ material to independent learnears, like I am.

[JolieFleur]

I wish I had her as my chemistry professor. She explains things so clearly.

[kumarpranav]

I was in seventh class reading the very basic of chemistry like solid, liquid, gas type of thing, when the lecture was uploaded. And now I feel amazed while watching the lecture. Thank you MIT so much❤❤❤

[trenttagestad]

I've had the Rutherford experiment explained to me probably a dozen times, and this is the first time I feel I truly understood the methodology and Rutherford's headspace

[foutokinata]

I'm now trying to get my 2nd bachelor, this time in chemical engineering, and my teachers do not explain this well. Thank you MIT for letting me understand what I'm studyin elsewhere

[herambpatilofficial]

Please make a playlist on Organics chemistry, it'd be great

[Plexversal]

The fluent connections of how atomic matter were discovered in this lecture were portrayed amazingly

[--]

This is so awesome that these lectures are posted. One of the finest institutions in the world, and I get to learn for free. Amazing.

[diegoarmandosalazarimpata]

37:21 That would occur if the electron were static, but it has a tangential velocity (classically speaking), that's why 'it is in a circular motion'. I think that there is a misunderstanding. The problem is not precisely newton's law but maxwell equations that says if a particle is acelerated like in this case, the electron, it should radiate and loose energy causing it to decay into the nucleus.

[snoopdogofscience]

Marie Cuire was from Poland, she lived in France due to occupation of Poland

[Unknowledgeable]

0:38 limiting reactant? Synthesis? Moles? Reaction vessel? This wasn't covered in the wk1 lecture iirc, how do the people in the lecture know how to do this question?

❤2:05 discovery of the electron AND the nucleus; 2:24
2:37
2:44 how do you study something that is really small?
❤3:07; 3:19
3:29 dangerous, hubristic thinking that slows progress
3:43 what is the atomic theory of matter and Newtonian mechanics? What are their principles?
4:00
4:11 atomic theory of matter is updated when the electron was discovered?
4:22
4:29 JJ Thompson's experiment to discover the electron
4:37 cathode rays? You can see rays? Evacuated glass? You can apply current to gases?
4:58 negatively charged particles? Positively charged particles? Neutral charged particles?
5:06 you can actually see cathode rays get deflected? You can charge plates?
5:18; 5:27 voltage difference?
5:40; 5:49; 6:08 cathode rays contains negatively charged particles
6:15 negatively charged particles?
6:30
6:43 deflection of negatively charged particles
- you can measure the magnitude of the charges of particles? (So some particles can be more negatively charged than other particles); 6:50
7:14
7:22
7:47 there is also a positively charged particle
8:21


10:32
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11:54
12:05
13:30 radioactive material can emit alpha particles
- idk what ions are
13:39
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17:50
❤18:02 Rutherford's discovery of the nucleus
18:09
18:38
18:55 how did he know the overall atom is going to be neutral?
19:37
25:47
26:32

28:31

31:23
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37:49

[brandoncrenshaw]

This is amazing. I'm an old dude going back to school to do/learn things that I regret blowing off when I was younger,
and this video has made me feel even more the idiot for blowing off chemistry. (I skipped the majority of classes and
didn't even bother dropping the course)... the questions answered in this one video... man!!!

[byabdullahsahibzada]

1:10 the answer is none because this ammonia reaction is reversible and in reversible reactions there is no limiting and excess reagent

[FreeCourseBLGX]

Thanks for the videos that we can learn Outside the University. thank you so much for your work

[kumarpranav]

Thank you so much for the wonderful content❣❣❣❣❣

[lsbrother]

13:00 Actually Rutherford was at the time of his illness a 'Lord' - not merely (!) a Knight. And it was Lords that were entitled to be treated - if they so wished - by a Knighted doctor. He was operated on in good time - by a Knight - but later there were complications and he died. i don't believe it's true to say he died because of waiting for a Knight!

[neerajazad]

Thank you so much for providing this i hope through chemistry I can make this world a better place

[katel]

Wow, I never found Chemistry so fun and interesting!! As someone with honours degree 14:07 got me lol

[TaregtNeet]

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Tricks are so osm