History of Atomic Theory

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We all know that atoms exist. But we didn't always! A lot of people contributed in different ways to help develop our current understanding of atomic structure, starting all the way back in Ancient Greece. Grab some popcorn and let Professor Dave tell you the story!
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Опубликовано:

21 июн 2015

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Комментарии : 221

@crissy5431 7 лет назад

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

@ProfessorDaveExplains 7 лет назад

oh, i won't stop!

@memoryerror1008 3 года назад

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

@nikhilramprasad6887 3 года назад

@@memoryerror1008 lol

@moonandtanu7591 3 года назад

@@ProfessorDaveExplains 😂k thanks

@EliotThemastermind-xb6xp 8 месяцев назад

When was the word GOAT actually created

@Vikas-ow8mm 6 лет назад

U deserve way More Recognition dude ;)

@ProfessorDaveExplains 6 лет назад

tell your friends!

@Vikas-ow8mm 6 лет назад

Professor Dave Explains Sure :)

@fireemblem2770 3 года назад

@@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

@shivamchouhan5077 2 года назад

Almost 2M now

@shivamchouhan5077 2 года назад

@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

@aparnamukerji2660 3 года назад

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.

@zak30 8 месяцев назад

yapping at its finest

@Ciorstaidh 4 месяца назад

@@zak30 womp womp

@zak30 3 месяца назад

got 8 whomp whomp@@Ciorstaidh

@zak30 3 месяца назад

@@Ciorstaidh at your big age

@Ciorstaidh 3 месяца назад

@@zak30 😢

@lauracabrera8257 4 года назад

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!

@siddharththayil122 7 лет назад

Why hadn't I found you earlier?

@Hariharan-ze3uf 4 года назад

Wow! The basics are really understandable. Thank you Professor Dave, you saved me.

@annabethelston8101 5 лет назад

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!!!!!

@JasonsWeirdPizz 3 года назад

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

@davidm5674 3 года назад

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.

@ronen44444447 4 года назад

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

@rinyeongi6322 2 года назад

Thank you for this prof dave

@stefxc 3 месяца назад

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

@courtcomposer Год назад

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

@nickstuaw Год назад

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 Год назад

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

@nickstuaw Год назад

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

@thehotgates1424 6 лет назад

Great summary.

@abdul-latifsoudmussa3862 5 лет назад

Great one, Thanks a lot Professor perfect one

@VanshKumar-iy5tj Месяц назад

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

@king_arthurplays 17 дней назад

I really love the intro. Good explanation too!

@rudymelo880 2 года назад

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

@jdzbabatoan 3 года назад

Please do Inorganic Chemistry Series

@bijoyshah3107 7 лет назад

your video are great sir !

@Hardsacker Год назад

thank you for this share of knowledge :D

@krishnaswamy6684 4 года назад

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

@Jnely9 11 месяцев назад

Thanks!

@the_advance_chemistry 9 месяцев назад

Thanks for information

@quantaali543 6 лет назад

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

@Felishamois 6 лет назад

He truly rocks

@greater40lifeinAmerica 3 месяца назад

This heps a lot thanks!

@chochee07 8 месяцев назад

Thanks for vid!

@katrinafung9072 3 года назад

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

@ProfessorDaveExplains 3 года назад

helium nuclei, it'll make more sense later!

@rhlsy3209 2 года назад

@@ProfessorDaveExplains still answering questions years later, amazing!

@selam12323 5 месяцев назад

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

@jhanavis5690 3 года назад

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

@zeannejoylabadia222 5 лет назад

thank you prof

@kimirene3147 2 года назад

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

@servantofgod9679 2 года назад

JESUS loves :)

@nanigarringer5970 6 лет назад

Thank you funny and awsome dud NEVER EVER STOP MAKING!

@GingerWaters 9 месяцев назад

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

@operationaltactics1006 Месяц назад

At which university are you a professor?

@uwotm8634 7 лет назад

wasn't kanada the first to do so?

@user-gy5dm8lt7v Год назад

That's great

@lakshmiprasanna6181 3 года назад

Best educational RU-vid channel Love from India 😍

@ajsworld77 6 дней назад

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

@ProfessorDaveExplains 6 дней назад

just keep going through the general chemistry playlist

@no_more_dream_bts4875 12 дней назад

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

@jomomma8261 3 года назад

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

@gokulanithanandakumar9628 5 лет назад

Maharishi kanad actually proposed the atomic theory 2 centuries before aristotle

@josejordan7528 4 года назад

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

@thegoodlydragon7452 4 года назад

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

@carultch 2 года назад

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.

@atumicgain 4 месяца назад

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

@KushagraYadav-kush7 4 месяца назад

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

@dr.garbage8965 4 года назад

You're the hero of school projects!

@lolitalolita1667 3 года назад

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

@rassimsimou1594 2 года назад

Good

@Infiniteemptiness 2 года назад

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

@nanpyal8108 7 лет назад

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

@krisclark8619 3 месяца назад

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

@abinayasivasamy4708 3 года назад

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

@ProfessorDaveExplains 3 года назад

Rutherford.

@abinayasivasamy4708 3 года назад

Thank you And what did Goldstein discover?

@ProfessorDaveExplains 3 года назад

Never heard of him.

@abinayasivasamy4708 3 года назад

Eugen Goldstein?

@spideybot Год назад

@@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.

@bijoyshah3107 7 лет назад

is there anyway to download all your videos in one click. is I am downloading your every videos one -by-one

@ProfessorDaveExplains 7 лет назад

not that i'm aware of!

@eduardob8458 8 лет назад

what about niels bohr, what was his contribuction

@ProfessorDaveExplains 8 лет назад

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

@JakubChalupnik Год назад

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 :)

@ludicrous3210 6 месяцев назад

pls cover stoichiometry you make so much sense 🫶

@ludicrous3210 6 месяцев назад

nevermind thanks for the videos dave

@user-ru4kv6mi6e 4 года назад

great

@sergclr 3 года назад

u made me survive my online chemistry class thank u master

@mxoeneod90 3 года назад

@samilefabriciodossantos7114 2 года назад

perfeito!

@t.thomas6967 8 лет назад

it would help if there was video of the actually experiments

@ProfessorDaveExplains 8 лет назад

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

@waltersobchak7275 8 лет назад

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

@carultch 2 года назад

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: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-XBqHkraf8iE.html And here is a replica of JJ Thompson's experiments to determine the charge-mass ratio of the electron: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-I2wS4QtphRs.html

@MB-nv6hf 3 года назад

Thanks from Morocco 🇲🇦

@MB-nv6hf 3 года назад

شكراا لك من المغرب

@danielholta5721 5 лет назад

Had to look up what alpha particles are. Now i see why some alpha particles scatters in random direction in the gold foil experiment.

@klynerp 4 года назад

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.

@dhichicpop2531 3 года назад

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 7 месяцев назад

Just an indian lie 😂

@subrajeetmaharana 3 года назад

Favourite Student of Richard Feynman:- Professor Dave

@isabelhuang_1 8 лет назад

But what about Leucippus, Democritus' teacher?

@ProfessorDaveExplains 8 лет назад

+Isabel Huang i dunno, did he say anything about atoms?

@waltersobchak7275 8 лет назад

+Professor Dave Explains All that knowledge, and esteem, and you still have a sense of humor!!! Well rounded instructor, many of your peers could learn from you!! Serious but not to serious!!!!!

@chandrakishorjha3600 6 лет назад

Sir, the first atomic theory had descovered by rishi kanad in 500 bc You can check on internet

@chutenderchodi7369 7 месяцев назад

Peer reviewed scholarly sources don't buy your claim

@danieldanieldadada 5 месяцев назад

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.

@bartonpaullevenson3427 5 лет назад

You forgot to say why there had to be positively charged particles in the atom--because the atom was neutral before the negatively charged electron was ejected from it.

@ProfessorDaveExplains 5 лет назад

I did not forget to say that.

@thatomofolo452 7 месяцев назад

👍👍

@kirbythepokemon7887 8 лет назад

that intro tho

@vanessacrespo7696 5 лет назад

el bato looks like hozier.

@RapidBlindfolds 3 месяца назад

what actually are alpha particles?

@ProfessorDaveExplains 3 месяца назад

helium nuclei

@RapidBlindfolds 3 месяца назад

@@ProfessorDaveExplains thanks! are you also able to explain why the commonly depicted atom is shown with the electrons flying around in that configuration at 3:39? the last point you made was about positively charged subatomic particles repelling eachother, but this would work differently with neutral charged neutrons, positively charged protons and negatively charged electrons right?

@spaceinsight6679 3 месяца назад

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 👍

@avjeet888 6 лет назад

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 7 месяцев назад

In a Bollywood movie

@bartonpaullevenson3427 5 лет назад

And I think Rutherford mentioned a cannon, not a shotgun. Just nitpicking.

@ProfessorDaveExplains 5 лет назад

"It was quite the most incredible event that has ever happened to me in my life. It was almost as incredible as if you fired a 15-inch shell at a piece of tissue paper and it came back and hit you." - Ernest Rutherford

@Nellson_Miless 21 день назад

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 '😂🤭

@ScienceBusted 8 месяцев назад

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.

@hanniemunch5581 5 лет назад

Yoq na

@earthdweller5136 3 года назад

What's between the nucleus and the electron? Is some kind of vacuum?

@ProfessorDaveExplains 3 года назад

just regular old space

@earthdweller5136 3 года назад

@@ProfessorDaveExplains 😂as I said I suck at chemistry, I apologize in advance for future dumb questions 👍

@virsuryaircas 6 лет назад

what about neils bohr..?

@ProfessorDaveExplains 6 лет назад

keep going through the general chemistry series, there's one clip just for him!

@Amarhindy_peacefx 3 года назад

wAo, chemistry became a piece of 🍰 to me now.. Sir, the name of your chemistry app please

@ministerofpropogandaii5718 9 лет назад

Professor Dave, the next video about nuclides is private.. what gives?

@ProfessorDaveExplains 9 лет назад

Minister of Propoganda II sorry, i'm releasing these one or two per week over the summer! they aren't all edited yet so i have to pace them properly. nuclides will go up in the next couple days, i promise!

@ministerofpropogandaii5718 9 лет назад

Professor Dave Explains No Problem

@TwasNeverThus2 6 лет назад

where do you get your passion and smarts from? Are your parents Einstein's?

@ProfessorDaveExplains 6 лет назад

I just like knowing stuff and want everyone to know stuff!

@user-ei6ud4ee3o 11 дней назад

First Atomic theory is given by maharishi kannad an indian rishi wo gave that matter is made up of tiny particles called parmanu

@user-py7tm1fe1g 5 месяцев назад

Coquitlam ala keda keda y

@amannoobs 6 лет назад

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 5 лет назад

buckethead 90 you are right

@mauryanempire7503 Год назад

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

@mauryanempire7503 Год назад

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

@mauryanempire7503 Год назад

Source -wikipedia and brittanica

@mauryanempire7503 Год назад

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

@toddbukauskas8804 2 года назад

Democritus, a Greek philosopher, was the first to propose a concept of democracy Just kidding, thank you for teaching me Professor.

@Jnely9 11 месяцев назад

The dogone people in Africa also knew about matter. No hate I love the video. Thanks

@sajsultan1839 4 месяца назад

How did they come up with the theory of its structure in a atom when they never see a atom ,nor do we have anything powerful to see a atom.. And am I right to say they real never seen a atom it a theory to their existence..which is probably true , but they never seen one rigth ?