How The Atomic Number Was Discovered

Рет қаралды 54,111

Күн бұрын

Пікірлер: 102

@jimquinn Ай бұрын

I have a pleasure of lecturing on Moseley every year in classes when talking about EDS in an SEM. It amazes me how many chemistry, physics, geoscience, and materials students are not taught this topic. Great video.

@RationalThinker118 Ай бұрын

One of the things I love the most about making these videos is giving these scientists the exposure they deserve. Thank you!

@johncourtneidge 29 күн бұрын

Please explain the acronyms.

@jimquinn 28 күн бұрын

EDS energy dispersive spectroscopy and SEM scanning electron microscope

@Mik1604 Ай бұрын

Very interesting, I find it completely unbelievable how so many of these guys changed the whole world before they were 30.

@danielebrparish4271 Ай бұрын

So did Einstein at 27.

@tonypitsacota2513 Ай бұрын

Well done. By far the best video on youtube concerning atomic numbers. Thank you.

@Finkelthusiast Ай бұрын

Great video! Would love to see a video on the discovery of spectroscopy

@RationalThinker118 Ай бұрын

Interesting idea! Thank you 😊

@christianlibertarian5488 Ай бұрын

I’m 64 and a retired physician. This is the first time I have heard this tragic story.

@محمد_9_6_3 Ай бұрын

A retired "physicist" or "physician"

@christianlibertarian5488 Ай бұрын

@@محمد_9_6_3 Physician

@michaelblankenau6598 Ай бұрын

Not anymore tragic than a million others like it .

@jmchez Ай бұрын

The great Science and Science Fiction writer, Isaac Asimov, stated that Moseley's death was the costliest to science of any death in any war.

@johncourtneidge 29 күн бұрын

Lavoiser att least as much.

@eduardoroth8207 Ай бұрын

Moseley's fate is heartbreaking

@RationalThinker118 Ай бұрын

It is 😢 to think the life he would have lived

@davecasler 25 күн бұрын

Please add a plosive filter to your audio setup. They're cheap and effective. Good video.

@marionfelty7247 25 күн бұрын

Thanks!

@RationalThinker118 25 күн бұрын

Glad you enjoyed it!

@jamesraymond1158 Ай бұрын

Excellent documentary

@arifurrahman1498 Ай бұрын

The great scientific minds are often victim of prejudice and political meanness. another example is Alan touring.

@jamesT008 Ай бұрын

Great work...n informative

@RationalThinker118 Ай бұрын

Thank you!

@bobthecomputerguy Ай бұрын

It's weird to think the proton was discovered after powered flight.

@yecto1332 Ай бұрын

Weird how. Just have open mind

@bobthecomputerguy Ай бұрын

@@yecto1332 We went from discovering the proton to splitting the atom faster than powered flight to space flight. It seems like the proton should have at least been discovered before general relativity.

@yecto1332 Ай бұрын

@@bobthecomputerguy dude r u even listening to urself u sound so funny why are u mixing planes and atoms together they both belong to different field with different people who has no idea what the other people on their field r doing if splitting atom thing came before ur powered flight so be it. People have been trying to understand atom way before ur enlightenment era so it made progress in its own time. Talking about general relativity. Einstein just made our understanding about gravity more refined, newton’s work still holds true we still use newtonian mechanics to send man made objects into celestial bodies. Maybe tomorrow we will understand quantum physics better before discovering new understanding about gravity if there is any discovery left. Nothing is weird it’s people working in different fields on their own pace.

@Michael75579 Ай бұрын

@@bobthecomputerguy I find it amazing that we went from first powered flight to man-on-the-moon in less than one person's lifetime.

@jimsvideos7201 Ай бұрын

Good show.

@RationalThinker118 Ай бұрын

Thanks so much!!

@doncarlodivargas5497 Ай бұрын

But,how in the world did people in that time find the atomic weight!?!?

@RationalThinker118 Ай бұрын

Perhaps I will make a video on that as well 😉

@doncarlodivargas5497 Ай бұрын

@RationalThinker118 - yes please do, it have always puzzled me, and everyone mentioning this, but never explain how to find out Another issue I find just as puzzling is how people are referring to iron or oxygen if it is about atoms, but nobody refeer to an iron proton etc, but if atoms release energy when they fuse together, something inside must change, and what is inside is exactly protons and neutrons etc

@karhukivi 14 күн бұрын

By accurate weighing of the products of a reaction between compounds. It is now done by mass spectrometry.

@doncarlodivargas5497 14 күн бұрын

@karhukivi - OK? I'm sure you are right, but if I mix 1 kg iron with 1kg oxygen, will I not have 2 kg rust? What does that tell me?

@karhukivi 13 күн бұрын

@@doncarlodivargas5497 The experiment needs to be a bit more precise. A typical school experiment is to dissolve a precise amount of zinc in hydrochloric acid and measure the amount of hydrogen produced. Corrections have to be made for the temperature and pressure and the amount of hydrogen can then be determined in moles. (1 mol of a gas is 22.4 L at STP). That gives the amount of moles of zinc for the weight used, and that in turn gives the atomic weight of zinc. (1 mol is the atomic weight in grams). For the other elements a lot of precise and creative chemistry had to be done, but nowadays it is done by mass spectrometer, not "wet" chemistry!

@itzakehrenberg3449 Ай бұрын

4:08 You stated Moseley's law incorrectly: It is supposed to be a linear relationship between the atomic number Z and the SQUARE ROOT of the frequency.

@volta2aire Ай бұрын

"the law states that the square root of the frequency of the emitted X-ray is approximately proportional to the atomic number"-Wikipedia

@RationalThinker118 Ай бұрын

@@volta2aire Yep, it's square root. Square root is even in my script. Just mispronounced it and never caught it. Thanks

@jimparsons6803 Ай бұрын

I recall hearing of Moseley's Law and Staircase during my Freshman year's Chemistry. A key moment in Chemistry or Physics. Boggle. What is not often talked about is that Rutherford smashed Atoms of Nitrogen about 1919 or so. He used a small bit of Radium mounted in a dent in a small Lead block. Radium produces radioactivity in the form or Helium nuclei. Even more boggle.

@danielparsons2859 Ай бұрын

Great video. This video is beautifully put together. Thank you.

@RationalThinker118 Ай бұрын

I appreciate you! I tried to make it interesting. 🙏

@PursuitofKnowledge178 Ай бұрын

Excellent story and documentary...well done!

@RationalThinker118 Ай бұрын

Thanks! Glad you enjoyed it!

@Fomites Ай бұрын

Great video - thank you. 😊

@kingoftadpoles Ай бұрын

I don't recall hearing about Moseley before, but it is 40+ years since I studied chemistry.

@jondeere5638 29 күн бұрын

Mosely, one of the great experimental physicists of his day who's life was cut short by a Turkish bullet at Gallipoli. He invented an ingenious assembly line to test the elements.

@drnotof6124 Ай бұрын

I had never heard about this, nice video!

@aminnima6145 19 күн бұрын

I love it when science is explained in its historical context ❤ thanks a lot

@marionfelty7247 25 күн бұрын

At 8:09 in video I want that chart. Where can I buy it?

@JohnSmall314 Ай бұрын

Well, researched, well explained. And remarkably, not voiced by AI. Unlike many others. Well done

@Book-em_media Ай бұрын

When I hear about how wars drive innovation and all the great stuff we get from it I think about how far it also sets us back. the lose of all the bright futures of those killed and the generational knowledge they hold that won’t be passed down.

@jimralston4789 Ай бұрын

Truly. The lost potential of millions of lives killed as well as the loss of contribution from their potential offspring is immeasurable.

@alainquinzelaire1253 Ай бұрын

@@jimralston4789 C'est pourquoi on fait du sur-place en perdant du temps avec la bêtise humaine....

@aimechateau2722 26 күн бұрын

Je partage votre analyse.

@tomakmens2607 Ай бұрын

Excellent channel

@johncourtneidge 29 күн бұрын

Thank-you. Shared to my Chemistry: What, Why, How page.

@jupa7166 Ай бұрын

Very interesting video, thank you very much!

@RationalThinker118 Ай бұрын

Glad you liked it! Thank you!

@JoseFernandez-qt8hm Ай бұрын

scientists want the fruits of victory but are unwilling to die for them.....

@karhukivi 14 күн бұрын

You are referring to politicians and "leaders", not scientists.

@MajSolo Ай бұрын

I really like these videos with science you remember from school and then in the video you learn about the person behind it which we did not in school.

@RationalThinker118 Ай бұрын

I'm glad you enjoy seeing the humanity behind these discoveries! Thank you.

@jondeere5638 29 күн бұрын

A more detailed description of Mosley is related in the Docudrama: "The Mystery of Matter: “INTO THE ATOM”"

@davidthegreen Ай бұрын

Imagine what other scientific discoveries he may have made had he not been killed in WWI

@felixbouvet1746 6 күн бұрын

Merci d'avoir bien expliqué je suis vraiment rentré surpris et la précision sur les couches orbitales électronique les différentes types de rayonnement😅😅😅 il se comprend maintenant pourquoi les éléments sont classés dans un 😊 entreprise

@noelamundarain6719 Ай бұрын

Quiero más videos como este, en español! Gracias!

@RationalThinker118 Ай бұрын

Hi! Was the video in Spanish for you?

@roliveira2225 Ай бұрын

Excellent!

@luisaparecido5885 Ай бұрын

Very good

@johndepledge1811 Ай бұрын

Thank you.

@majorrgeek Ай бұрын

actually it was Dimitri Mendeleev who invented/discovered the periodic table based on atomic number of the elements. It left gaps in the table for future scientists to fill with newly discovered elements - the advantage they had is that they knew what elements to look for to fit the gaps

@richardpark3054 Ай бұрын

But how would one search for an element knowing only its atomic number?

@doncarlodivargas5497 Ай бұрын

@@richardpark3054 - I think elements have characteristic qualities based on their atomic number, that's why Medelev came up with the periodic table in the first time, sorting the elements by their characteristic qualities

@alainquinzelaire1253 Ай бұрын

@@richardpark3054 Avec ce tableau, on a pu prévoir les qualités des éléments avant de les découvrir, ce qui surprend ceux qui pensent que tout vient du hasard !

@nevillehoward8736 Ай бұрын

The first "official" table?

@carlosdiniz6999 Ай бұрын

Muito bom saber. Obrigado.

@adrianocd0806 Ай бұрын

Show👏👏👏👏👏

@garyc1384 Ай бұрын

2:45 - in the atoms orbit around the nucleus, LMAO.

@angusmackaskill3035 Ай бұрын

Avagadros number

@Ledgwins Ай бұрын

Nice video but you could use a pop filter on the mic.

@JeanSarfati Күн бұрын

Mendeleïev life would be in priority to this anglo-saxon rewriting, because HE was the founder ! O tempora o mores.🤨

@Unna1969 Ай бұрын

Medeleev could have become the chemical Einstein. But it is too late. Physicists have Einstein and Newton and many others. Biology has Darwin. Chemistry? - No equivalent figure that became a popular figure and a household name. Just an interesting observation.

@GH-oi2jf Ай бұрын

Lavoisier? Marie Curie? Linus Pauling?

@Unna1969 Ай бұрын

@@GH-oi2jfFeel free to ask your cousin about the difference between Pauling and Einstein. Or show him 2 portrait pictures: Lavoisier and Darwin, asking who is the guy with the curls?