History of Atomic Theory

[@aparnamukerji2660]

Dear Mr. Dave, Thank you for creating various series on different scientific concepts. I am recent graduate from M.Sc. Biology, LU, Canada, hoping to get into Med school and this is such a boon as I get to revise, clear my concepts and learn in depth. Thank you for helping millions of students all over the world. Extremely grateful to you. I guess with Science, something that we need to imbibe in academia is simplicity and the art of communication. I love science and sincerely hope that you keep spreading the love for Science and curiosity.

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Please never stop making videos! You are the GOAT (Greatest of all time).

[@ProfessorDaveExplains]

oh, i won't stop!

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@Owen Alejandro Both of you are bots/fake accounts run by the same dude, created on the same day.

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@@ProfessorDaveExplains 😂k thanks

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When was the word GOAT actually created

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Thanks!

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U deserve way More Recognition dude ;)

[@ProfessorDaveExplains]

tell your friends!

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Professor Dave Explains Sure :)

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@@ProfessorDaveExplains And yet here we are 3 years later, and you are over 1 million subscribers too few! Not enough! People need to know about you

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Almost 2M now

[@shivamchouhan5077]

@johnnytheprick The idea of using gold foil is that, we want to have a single atom to do experiment which is not possible in real life till now, but gold is the most malleable thing in the world. So we can make gold foils so thin that their thickness is around 1000 atoms. So Rutherford's experiment works with gold foils. But in liquids and gases, the density is definitely less than solid but they can't be made that thin because all time their thickness is more than quintilians of particles. Which definately affects the Rutherford's experiment

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Who is watching in 2024

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I have test in 2 weeks

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@@aradhazarigood luck 🙏

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I am (im using my moms account lol im jr. highschool test in 1 week😢)

[@Iambbatman]

Test tomorrow 😔

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@@aradhazariI have an exam tomorrow 😢

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I am so happy to have found this channel. The content is so easy to understand and the production of the video is so well done. Thank you so much! You make an awesome professor!

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Your videos are the top in the entire milkyway, goodjob.

[@TheKids422]

Professor Dave, never ever stop your spectacular videos! I am not kidding when I say this, but 90 - 100% of my day are learning from your absolutely amazing and spectacular videos! I am not exaggerating when I say this, but you deserve to be the top KZbinr in the academic field. 😍

[@nickstuaw]

1:06 - Is anyone else questioning the hydrogen to oxygen ratio in water? Surely it should be 3/9 oxygen and 6/9 hydrogen since there is 1 oxygen atom and 2 hydrogen atoms in a water molecule. He then says at 1:27 that "no matter how much water there is, it will always have the same ratio of H to O by number of atoms and therefore by mass". One water molecule contains 3 atoms: 2/3 of it are Hydrogen atoms and 1/3 is an Oxygen atom.

[@ProfessorDaveExplains]

The ratio given is by mass, not number of atoms.

[@nickstuaw]

@@ProfessorDaveExplains Oh! Thanks Dave!! That explains it, I thought I'd missed something

[@StructuralEngineer-e3m]

Absolutely amazed by your videos in every aspect.

[@landat_87]

Because of this subject. I'm going to stuck with you Prof Dave.

[@TheKids422]

same here

[@EngineeringAcademy-y8s]

Love your work Professor

[@davidm5674]

This is literally my favorite topic. Knowing how the concept of the atom evolved. While it may seem to the side, I love the experiments used.

[@JasonsWeirdPizz]

I know why my chemistry teacher uses your videos now, this was so easy to understand thanks to you 🙏

[@annabethelston8101]

this video is so clear and easy to understand while still keeping a good speed. this helped me a lot with me remediation for my chemistry class so thank you!!!!!

[@Nofer-i5w]

make more videos, what you waiting for, you will be even more successful

[@king_arthurplays]

I really love the intro. Good explanation too!

[@TheKids422]

Dave, you are amazing

[@aevessean]

bro you're a savior❤

[@atomicsweetXx]

Who got a test tomorrow

[@sheldon-g4g]

Me 😂 this is why I’m watching

[@jeydrielmartinez8135]

Watching right before a test😅

[@AriannaStewart-vd2ue]

Me

[@brentpagador8094]

Me

[@abdullakurd8174]

Me 😅

[@kimirene3147]

this is my first time hearing that atoms are 99.95% empty, thank you so much

[@servantofgod9679]

JESUS loves :)

[@ronen44444447]

Thank you, I dreamed of delving deeper into Chemistry for years

[@stefxc]

I have a chemistry test tomorrow morning, this helps SO MUCH!

[@sofiastock-fn4rd]

please don't ever stop making these videos AND please please please NEVER cut your hair, your hair is amazing and absolutely stunning 💝💝💖💖💖💖💖💖💖💖💖💖💖💖💖💖

[@knull1237]

If not for you and The Organic Chemistry Tutor I'd have failed my degree. So thank you 😂

[@atumicgain]

Crash course on an atom, the electrons are points of intersection from strong force; each shell starting from the nucleus out are lessened due to less perpetual motion acting out from kinetic force of the nuclei. Therefore an atom is still a ball shaped structure but flows like modern interpretations think. Think of each point of intersection as a node and comparatively a person pulling on a rope in unison. If you can understand this then you can understand string theory

[@courtcomposer]

I just read your book. It was great. Thank you.

[@jacobvidales123]

I recently heard a book by a professor first name Benjamin don’t remember the last name. The book is called Black Holes ties and curved space in his first lecture. He says Isaac Newton did not discover gravity because it was simply already there and if that’s his look upon something then the science community needs to decide if he didn’t then the person who discovered the electron or electrode, I forgot which one you said did not discover it. He just revealed it’s already existence so and in one instance in another science book by another professor teacher Dean of a school, I forgot which one he says nothing is faster than light but he describes something 10 times the speed of light so why the contradiction

[@afrog7595]

Mr. Dave, I am watching this video to help understand the history of modern atomic theory for a paper I'm in the process of writing, and it was incredibly helpful. However, I am troubled by the early claim that separates philosophy from science, and that Democritus's view contained no supporting evidence for some time (0:35). There are serious fundamental differences between what John Dalton would call an atom, and the necessary characteristics of Democritus's atom (since Democritus refers to, effectively, a Parmenidean being). That said, philosophy and science were understood historically to be the same thing, the word science coming from the Latin "scientia", which was seen by philosophers of the time as a type of knowledge. Democritus uses what I would argue is no different than the lines of reasoning that a modern scientist might use to arrive at a conclusion. Given the practice of natural philosophy which Democritus's theory stems from, he does begin with observation as contemporary sciences do. I love the video! I could not help but express my concern with the opening statement, but I don't want to be misunderstood. Everything in the video is entirely accurate to the best of my knowledge and you demonstrate an understanding far more comprehensive than mine on the topic. Despite the differences in metaphysical commitments, and the fundamental differences between the views, I still believe that the wording used undervalues the thinking and reasoning behind Democritus's theory. For example, the proposition that "compounds consist of different type of atoms in whole number ratios" (summarizing a view proposed by Dalton at 0:50) is true by Democritus's account as well, as well as the claim that rearrangement of atoms form new combinations. Still, Dalton's view is more explicit, numerical, and more helpfully linked to mathematical truths in our observation. Please let me know if anything in my comments aren't accurate. I'm nine years late to the video, too. Not too helpful for me to put this here now. Lol.

[@rinyeongi6322]

Thank you for this prof dave

[@lakshmiprasanna6181]

Best educational KZbin channel Love from India 😍

[@siddharththayil122]

Why hadn't I found you earlier?

[@selam12323]

I swear my phone were broken and when my new phone bought i open YT and subscribe you.keep it up

[@ajsworld77]

What’s the best next video after this explaining the history of the atomic theory?

[@ProfessorDaveExplains]

just keep going through the general chemistry playlist

[@sergclr]

u made me survive my online chemistry class thank u master

[@mxoeneod90]

Oh

[@quantaali543]

Simple but best teaching style...you are what I was looking for....

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He truly rocks

[@norvinsevilla5893]

Watching this before my chem test 😂

[@abinayasivasamy4708]

Professor Dave Can u please explain who discovered proton? Rutherford or goldstein?

[@ProfessorDaveExplains]

Rutherford.

[@abinayasivasamy4708]

Thank you And what did Goldstein discover?

[@ProfessorDaveExplains]

Never heard of him.

[@abinayasivasamy4708]

Eugen Goldstein?

[@spideybot]

@@abinayasivasamy4708 Eugen Goldstein was a German physicist. He was an early investigator of discharge tubes, and the discoverer of anode rays or canal rays, later identified as positive ions in the gas phase including the hydrogen ion.

[@KushagraYadav-kush7]

thank you proffeser dave you are the best you never complicate anythingand always make it simple and easy to understtand your love from india

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Sir please continue and start making new videos it's amazing helped a lot

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It is very good❤❤❤❤❤

[@katrinafung9072]

So glad I found this channel! You're awesome! But I have a question for this video - what are alpha particles??

[@ProfessorDaveExplains]

helium nuclei, it'll make more sense later!

[@rhlsy3209]

@@ProfessorDaveExplains still answering questions years later, amazing!

[@ReynaBenitez-qd8us]

One I saw this was you video I was like “OH THIS GUY” and now I’m learning about Atomic theory 😀

[@bjornfeuerbacher5514]

Actually, Nagaoka Hantarō already came up with a "planetary model" for the atom in the year 1904, seven years before Rutherford's experiments were done.

[@BlueSky_Bot]

hopefully this can save my test tomorrow

[@rudymelo880]

I've heard about the gold foil experiment maybe even more than once and only now do I understand what it was. Thanks

[@gokulanithanandakumar9628]

Maharishi kanad actually proposed the atomic theory 2 centuries before aristotle

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My school is sending ur videos sir for online class😎 but i already saw a lot of videos from ur channel

[@operationaltactics1006]

At which university are you a professor?

[@TheKids422]

all of them

[@violent-firelight]

Bro what happened when the alpha particles hit the electron?

[@thehotgates1424]

Great summary.

[@jdzbabatoan]

Please do Inorganic Chemistry Series

[@GingerWaters]

How did Rutheford fire positively charged alfa particles to gold foil?

[@klynerp]

I take a chemistry course and I am learning English. I use these videos to train my English and learn more about chemistry. I'm from Brazil.

[@abdul-latifsoudmussa3862]

Great one, Thanks a lot Professor perfect one

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pls cover stoichiometry you make so much sense 🫶

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nevermind thanks for the videos dave

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your video are great sir !

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Your videos are short and to the point. I really wish more people discover this channel

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Thank God I found you😭❤️ I like the whole content and explanation Textbook is just so bulky and boring Thanks for this And also you remind me of 'Young Shelton '😂🤭

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young sheldon*

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Thanks for this wonderful video with the help of ur video I was able to complete my project and I even mentioned ur KZbin channel name 😀😊

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thank you for this share of knowledge :D

[@amannoobs]

Maharishi kanad actually proposed the atomic theory 2 centuries before the Greek philosopher. At takshashila. Greeks used to come and visit our universities in ancient times. Nalanda and takshashila which were famous during those times

[@gokulanithanandakumar9628]

buckethead 90 you are right

[@mauryanempire7503]

Lol 🤣🤣🤣 ancient Greeks philosopher Democritus and leuceppi already proposed atomic theory centuries before ancient indians did it.

[@mauryanempire7503]

Leucippus first proposed atomic theory centuries before kanada did it.Kanada was born in 2nd century BC

[@mauryanempire7503]

Source -wikipedia and brittanica

[@mauryanempire7503]

Lol 🤣🤣🤣 ancient Greeks philosopher Democritus and leuceppi already proposed atomic theory centuries before ancient indians did it.

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you are soooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo good

[@josejordan7528]

I never realized how small alpha particles truly were!!!

[@JakubChalupnik]

I am nitpicking, but in the book I've read ages ago, they said Rutherford was talking about 15-inch shell, not a shotgun. It's more funny this way :)

[@ScienceBusted]

Atomic structure theory Atroms are eternal electricity generators and transformers. All atoms consist of indestructible, electrically charged hollow sphere and internally charged solid sphere. What are called electrons are actually negatively charged liquid attached to the surface of the atom. The hollow sphere has multiple layers, each with an opposite charge. The inner sphere and inner layer of all atoms have the same charge. According to Coulomb's law, the inner sphere of all atoms are oscillating constantly at a natural frequency and never can touch the inner layer. Theoretically, the ability of an atom to carry any amount of energy depends on the input. Due to every atom has equal positive and negative charge. Therefore they all attract each other like magnets attract magnets no matter direction or distance. This is the mechanism of gravity.

[@nanpyal8108]

your are a good teacher you are supposed to be over 1k sub Infact

[@nanigarringer5970]

Thank you funny and awsome dud NEVER EVER STOP MAKING!

[@greater40lifeinAmerica]

This heps a lot thanks!

[@Anshulhe]

My friend please check out sage aruni 800bce and sage Kand 600bce they're first to come up with idea of atoms followed by greeks

[@aaryanandaryakhot4422]

I always luv the intro ❤😂

[@the_advance_chemistry]

Thanks for information

[@krisclark8619]

Great job Dave. But Rutherford meant shells as in artillery shells. Awesome content though!

[@MB-nv6hf]

Thanks from Morocco 🇲🇦

[@chochee07]

Thanks for vid!

[@cgsx69]

thank u ❤️

[@cgsx69]

ok

[@dr.garbage8965]

You're the hero of school projects!

[@uwotm8634]

wasn't kanada the first to do so?

[@bradhilton2283]

Dave is one ☝🏻 smart whopper! He could sharpen a butter knife too that of a razor.

[@Red_Eyed_Gravy]

Who has a Chemistry exam today and is just cramming before the test😭😭😭

[@avjeet888]

Maharishi Kanad proposed that matter consist of small individuals and he termed it "PARMANU" He did it 2 centuries before Demcritus THAT'S THE TRUTH!!!!

[@chutenderchodi7369]

In a Bollywood movie

[@wpgjet61]

Bro I have to watch this for a unit test coming up😂😂😂

[@ربيعالكيمياء]

That's great

[@chourouk-gr9qg]

Ty the goaat as always

[@zeannejoylabadia222]

thank you prof

[@Okolife]

WAIT CAN YOU MAKE A VIDEO FROM NIELS BOHR TO ERWIN SCHRODINGER THANK YOU

[@justinpettit3432]

3:37 "We arrived at a model that looks like this which should look familiar" Me: Yeah from Jimmy Neutron

[@dhichicpop2531]

Wrong the concept of small, indivisible, self-revolving particles that make up matter was first proposed not by Democritus but by Kanad in his book 'Vaisheshika Sutra' around 600 BC

[@chutenderchodi7369]

Just an indian lie 😂

[@justmonika3365]

thanks I hate having to remember history for science, I dislike history overall

[@subrajeetmaharana]

Favourite Student of Richard Feynman:- Professor Dave

[@lolitalolita1667]

why when I press aumatic translation, there is no translation?😓😩

[@MB-nv6hf]

شكراا لك من المغرب

[@rassimsimou1594]

Good

[@spaceinsight6679]

Thanks! But then atoms are not the building blocks of the universe? As electrons and protons make up atoms? And are atoms invisible? I mean does light pass through them like the alpha particles? And what are alpha particles? Recognition from India 👍

[@eduardob8458]

what about niels bohr, what was his contribuction

[@ProfessorDaveExplains]

+Eduardo Buzzetto the Bohr model! I have a whole clip on it.

[@thegoodlydragon7452]

How did they know what a neutral charge was before discovering g the electron?

[@carultch]

We knew that charge existed before the individual electron was discovered. Benjamin Franklin and Charles Coulomb made discoveries that led to our understanding of the electrostatic force, with macroscopic amounts of charge at macroscopic distances. Franklin discovered it qualitatively, and Coulomb discovered it quantitatively. We also had already assigned the size of the ampere unit, prior to the discovery of the electron, since electrochemical voltaic piles (that you'd think of as batteries) as well as the magnetic effects of current enabled us to reliably produce and measure current.

[@t.thomas6967]

it would help if there was video of the actually experiments

[@ProfessorDaveExplains]

+T. Thomas unfortunately, there were no video cameras in the 19th century.

[@waltersobchak7275]

+Professor Dave Explains That's fact!! Yes the truth shall set him free!! Like your clips Professor Dave.

[@carultch]

You can look for videos that people used for reproducing these experiments in modern times. Here is a replica of Rutherford's Gold Foil experiment, with a modern upgrade to the equipment: kzbin.info/www/bejne/jnPUeZ6olstrn6c And here is a replica of JJ Thompson's experiments to determine the charge-mass ratio of the electron: kzbin.info/www/bejne/f2PahGeHqdWbiNU

[@danieldanieldadada]

If a photon is needed to move an electron from one energy to the next one, why wouldn't electrons always be ejected from the atom since light is everywhere? I mean, photons are bombarding atoms all the time, no? Except in darkness.

[@jomomma8261]

So when columb force disappears why does it make a supernova?

[@jacobjones1692]

I love it