Atomic Structure: Discovery of the Neutron

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Tyler DeWitt

Tyler DeWitt

Күн бұрын

To see all my Chemistry videos, check out
socratic.org/chemistry
We know that there are protons and neutrons in the nucleus of an atom. How was the neutron discovered? James Chadwick found that atoms of Boron, Beryllium and Lithium released neutrons when they are bombarded with alpha particles. These neutrons cause protons to be ejected from paraffin wax. Neutrons are not gamma rays, because they have to have a lot of mass in order to knock protons out of paraffin with such speed.

Пікірлер: 423
@tdewitt451
@tdewitt451 11 жыл бұрын
Everything should seem like a piece of cake when you're first learning it. Why don't you want this basic information to be easy for students? I agree complex particle physics is hard. If a student understands the basics and likes it, they'll go on later to study the more complex details--maybe they'll become a particle physicist! But if they hate it when they first learn it because it's so impossible to understand, I guarantee they'll *never* learn more.
@hasankaiser4563
@hasankaiser4563 4 жыл бұрын
tyler why was it deemed the radiation was neutron
@shubham9a416
@shubham9a416 10 ай бұрын
You are not only a teacher but also the poor students' (like us) guide and motivation.
@gyan-vigyan-rcc
@gyan-vigyan-rcc 2 жыл бұрын
Love from INDIA by the help of Arijit daripa sir of Edu Point on KZfaq
@MaheshKota-wm8jk
@MaheshKota-wm8jk 2 ай бұрын
haa , me bhi check karne aaya tha edupoint se :)
@AashaAgarwal-sr9lw
@AashaAgarwal-sr9lw Ай бұрын
I f him
@JoseLucasRFiori
@JoseLucasRFiori 8 жыл бұрын
OMG, I can learn more Chemistry and english, together, well done! Thanks!
@neelamsantlani2076
@neelamsantlani2076 3 жыл бұрын
Same with me
@tdewitt451
@tdewitt451 11 жыл бұрын
Hey everyone, I'm here to help. If you have any questions or just want to learn more, click on the link in the description above. It'll take you to a page where you can ask me questions.
@chrish6780
@chrish6780 8 жыл бұрын
I learn more in these than in school.
@lekhbhatia8185
@lekhbhatia8185 7 жыл бұрын
ikr
@anaccount766
@anaccount766 6 жыл бұрын
ikr than i need tutorials
@aaronnava9941
@aaronnava9941 4 жыл бұрын
It's because he's not boring. A lot of these teachers are boring af.
@ballistiklekent6541
@ballistiklekent6541 4 жыл бұрын
I feel it's more to do with the environment, your able to watch this at home or whenever you choose
@totalrecall1358
@totalrecall1358 4 жыл бұрын
@@ballistiklekent6541 ^ I agree
@johaovilcarino1559
@johaovilcarino1559 8 жыл бұрын
You're sincerely the best when it comes to explaining, you should definitely replace my teacher. Thank you, we all really appreciate it. Keep doing what you're doing. Glad to have found your channel.
@khushisingh2163
@khushisingh2163 3 жыл бұрын
Still helpful in 2020 more than school or any teacher...❤️❤️ Thanks for being on KZfaq 😭😭
@DiptoSalam
@DiptoSalam 4 жыл бұрын
PLEASE START MAKING THIS CONTENTS AGAIN!❤️ When this video came out I was merely a baby! LOVE FROM BANGLADESH 🇧🇩 I now read in 11 th grade and I love chemistry.It is wonderful to know this awesome things living thousands of kilometres away from you.
@XxelitebeautyxX
@XxelitebeautyxX 8 жыл бұрын
So glad that I found your channel, by seeing your hands I can say that you was totally involved in teaching the stuff. Great tutor !
@nasreenmirza5712
@nasreenmirza5712 8 жыл бұрын
you are the best chemistry teacher. thanks for these awesome videos.
@coldcat021
@coldcat021 2 жыл бұрын
The way you teach is so easy and systematic.....all things just link together..... Best explanation!
@raraoohlala1893
@raraoohlala1893 8 жыл бұрын
I am so glad I found your channel. I was lost in class but you have given me hope.
@milindbebarta2226
@milindbebarta2226 8 жыл бұрын
You're the best teacher by a good margin on KZfaq.
@mattk183
@mattk183 2 жыл бұрын
Oh WOW i had no idea about this! The drawings made it so clear! My chemistry teacher sees that I know so much and she gives me more advanced work. Tyler, the amount of times I watch you is 90% and the amount of times I listen and see my chemistry teacher in a year is 10%. That shows that you are more better than my teacher.
@anuskasampath5652
@anuskasampath5652 11 жыл бұрын
this was amazing , I've been reading the same information in my text for hours now and was not able to comprehend nearly as i did when i watched this video , i understood everything the first time looking at it , thank you so much for making it this easy ! looking forward for more videos :)
@cheesecake7101
@cheesecake7101 8 жыл бұрын
omygod i have a report of this tomorrow and u basically saved my life
@duanecsgo
@duanecsgo 3 жыл бұрын
lol
@valg6280
@valg6280 9 жыл бұрын
Thank you so much for explaining this! You're tens times better at explaining things than my Chemistry teacher.
@michaelmurdoch
@michaelmurdoch 10 ай бұрын
Thanks! My textbook didn't explain it and I was curious, love your chem vids!
@wafawiwio112
@wafawiwio112 8 жыл бұрын
thnk u so much but i have one qq why did he use paraffine and non other thing???
@jozseforgovan8621
@jozseforgovan8621 8 жыл бұрын
thank you much-you are very good -slow and detailed. congratulations to you. very understanding and easy to see through what you demonstrated about neutrons. very good.
@firaca100
@firaca100 5 жыл бұрын
What a really good video! I hope that I can meet your video earlier when I was in high school ! Very well narated and good explanation!
@ronwynjacob6339
@ronwynjacob6339 8 жыл бұрын
doing a project on James Chadwick, this helped sooo much! ~thanks
@staytube4572
@staytube4572 2 жыл бұрын
thank you so much sir .... your videos help me a lot to learn chemistry. really appreciate your dedication. And I understand the concepts clearly.
@studylife01
@studylife01 2 жыл бұрын
thank you very much. I use this for understanding the test of discovering the neutron. I'm also glad to found your channel!
@jenzhg
@jenzhg 2 жыл бұрын
I was wracking my brain over his experiment for an hour or so and you literally just cured me in 10 minutes, YOU'RE AMAZING
@insookim2555
@insookim2555 9 жыл бұрын
Please be my chem teacher I'm learning more from your videos than I have in class the past month
@theramblingreviewer5150
@theramblingreviewer5150 4 жыл бұрын
Excellent video! Thank you for your clear explanation that really helped to give an understanding of the underlying mystery these scientists like Chadwick were trying to answer and how they answered it.
@abdullahabro9862
@abdullahabro9862 8 жыл бұрын
Too good and easy approachable lecture delivered by you.............. i am not even english speaker but despite it was too easy for me to handle your lecture as compared to others i found on youtube..... thumbs up....(y)
@thegalacticgamer6455
@thegalacticgamer6455 3 жыл бұрын
Brilliantly explained, helped enormously in one of my research tasks.
@Ayman-jc8mh
@Ayman-jc8mh 6 жыл бұрын
Can someond pls explain Why the particles that are getting shout out of atom doesnt have charge?
@rajveer808
@rajveer808 5 жыл бұрын
why only proton going out through strike of alpha particle? please answer me.
@radiantnet7443
@radiantnet7443 4 жыл бұрын
These vids are soo helpful I recommend them when I hear someone needs help
@deepakfialok
@deepakfialok 7 жыл бұрын
Absolutely genius of you to explain these concepts.... keep the good work going :)
@Ghost572
@Ghost572 11 жыл бұрын
I just wanna say I really enjoy your videos and you have a great way of explaining things keep up the good work!
@ayushsachdeva3051
@ayushsachdeva3051 7 жыл бұрын
Hey, Tyler. Just a question. Why would the neutrons strike out the protons of the paraffin? I mean the probability that a randomly striking neutron would strike such a small nucleus is tiny. Thanks in advance and also for teaching all this stuff.
@anushkagupta3901
@anushkagupta3901 3 жыл бұрын
Loved your method of illustrating and teaching ✌🏻
@ogborucharity3044
@ogborucharity3044 6 жыл бұрын
Please I would like to register for classes. How do i go about it. How about discovery of Protons.
@tortureh2371
@tortureh2371 6 жыл бұрын
Can anybody answer this : Why does bery/boron foil send out neutrons ? why couldnt it send protons as both as positive it should repel and proton should come out why doesnt it ?Why does proton come out of Paraffin wax ?Why was it chosen?
@hol9619
@hol9619 5 жыл бұрын
tbh
@tortureh2371
@tortureh2371 4 жыл бұрын
Well I don't even understand the question now lel
@ranjana6664
@ranjana6664 3 жыл бұрын
Yess,, I also have these doubts but nobody is understanding my these doubts 😟😟
@grimsobad8545
@grimsobad8545 3 жыл бұрын
MR. SWÂG makes a lotta sense now as I thigh it would like ya know clash
@swetachatterjee464
@swetachatterjee464 3 жыл бұрын
Same doubt...
@simarjeetkaur4667
@simarjeetkaur4667 4 жыл бұрын
I love to watch your videoes as they are concept clearing
@jrbird1983
@jrbird1983 2 жыл бұрын
if the proton shoot off the wax what does it turn into?
@HaileyC201
@HaileyC201 11 жыл бұрын
I wish you were my Chem teacher! Thank you so much!
@user-qe4nm7qx7m
@user-qe4nm7qx7m 5 жыл бұрын
How come they named elements and how they found no of electrons in each element initially..plz any body explain..
@raissatwiringiyimana5179
@raissatwiringiyimana5179 10 жыл бұрын
here I got question 1.which material do they use to shout those alpha particles? 2.neutrons have to have the same mass as protons or they can be more than that of protons in order to shout them?
@shrt2587
@shrt2587 4 жыл бұрын
This video really helped me in understanding the concept Thank you so much
@econguyph
@econguyph 3 жыл бұрын
road to 1M subscribers! You deserve it, Kudos
@stevenakpan783
@stevenakpan783 3 жыл бұрын
My best teacher ever. please make more videos, im begging of you
@jardina3809
@jardina3809 7 жыл бұрын
such a great lesson, expecting for more of them, thank u so much than l can tell
@leviterande
@leviterande 10 жыл бұрын
A question, the surface gravity of neutron stars far exceed the speed of light, how is that possible?
@foolingaround9348
@foolingaround9348 8 ай бұрын
Thank you so much you saved me The education of pharmacy in Algeria was in French until this year. I was struggling to find resources to study in English ❤😊
@destructorgaming8870
@destructorgaming8870 3 жыл бұрын
Thank you sir, now I am able to understand very well. Awesome video
@mayar4240
@mayar4240 3 жыл бұрын
Thank you so much you make this lesson sooooo esay for me .
@dodojef301
@dodojef301 Жыл бұрын
Do the neutrons knock out protons or postive ions?
@aarushiagarwal2321
@aarushiagarwal2321 2 жыл бұрын
Absolutely helpful explanation , but if i may ask , why are only the protons getting shot out of the atoms , and why only of paraffin wax , any possible explanation would be very helpful !..
@salmaashraf6246
@salmaashraf6246 8 жыл бұрын
Your explanation is perfect
@myownworld16
@myownworld16 4 жыл бұрын
Thank you sooo much!! Love your vids so clearly explained and so good🤍💕🦋💞🌙
@abdqudus
@abdqudus 4 жыл бұрын
Was there any reason why berilium, boron and lithium atoms were chosen?
@user-dm1gd1pw2o
@user-dm1gd1pw2o 5 жыл бұрын
you are so awesome . your speech in ted was also cool and it gave a nice advisory to all science teachers
@rishikesavan1110
@rishikesavan1110 5 жыл бұрын
why did not alpha particles comes out by repelling from nucleaus as u said in gold foil test???
@SNeili1
@SNeili1 3 жыл бұрын
Why were atoms of beryllium boron lithium used? Could that have been any atoms, e.g gold foil like in Ruthefords experiment?
@SeetaJoshi-zj3hi
@SeetaJoshi-zj3hi 3 ай бұрын
Sir you are the best teacher in the world. I beg you to please launch a chemistry course program for JEE students
@hikolanikola8775
@hikolanikola8775 2 жыл бұрын
So how does an alpha particle shoot out the neutron since it's about the same mass as the proton?
@cormyat07
@cormyat07 3 жыл бұрын
Very cool demo, but I'm curious why neutrons don't also come shooting out of the parafin wax?
@gracielamaleh7205
@gracielamaleh7205 3 жыл бұрын
Hi! Your videos are great!!! Do you have any videos on how are alpha particles produced (in order to be used to carry out experiments like the one you describe in this video). Thank you!
@SomethingAbtScience
@SomethingAbtScience Жыл бұрын
Any radioactive source would do. I assume he used uranium ore.
@gabym1226
@gabym1226 11 жыл бұрын
Can someone please tell me the name of the experiment?
@krimsonstriker6113
@krimsonstriker6113 3 жыл бұрын
Could you make another video more specifically explanation
@questguru
@questguru 2 жыл бұрын
I want to see how they measured Helium and Hydrogen atoms on s scale, what kind os scale is that? how they measured the weight of only 1 Helium atom?
@fatimalearns9618
@fatimalearns9618 3 жыл бұрын
Why the neutrons only shoot out protons and not neutrons present in the paraffin?
@danieljust295
@danieljust295 6 жыл бұрын
How atoms were weighted ? How do we know the neutron is neutral ? It’s only an assunotion that the weight if the neutron is similiar to that of proton.
@rahgirtanvinchowdhury2252
@rahgirtanvinchowdhury2252 3 жыл бұрын
Actually reading the book of chang, I remain a little confused, but after watching your videos, I become completely clear. Thanks for your nice videos.
@hayliewu9604
@hayliewu9604 6 жыл бұрын
thank you so much!! I hope schools can teach like you but they don't really teach
@jemappellelanoosh1743
@jemappellelanoosh1743 11 жыл бұрын
Ohh you are a greattt teacher :-) Thank you so much for your time and effort !
@negemumer47
@negemumer47 Жыл бұрын
OK it is clear definition but my question is what about the electron can't possible that the electron wes out
@MY-yi2ko
@MY-yi2ko 3 жыл бұрын
hmm i have a question why didn't the neutron get out when they hit the gold foil
@suyashmajhi994
@suyashmajhi994 5 жыл бұрын
How scientst determined the number of proton in each atom before comparing the mass of a atom with of the mass of hydrogen?
@shlomomuller6916
@shlomomuller6916 3 жыл бұрын
Did the 1910's model include multiple protons in the nucleus? Or was that only believed post the 1919 report from Rutherford about hydrogen nuclei being a component part of the nucleus of nitrogen?
@vivekrnajan8594
@vivekrnajan8594 4 жыл бұрын
Sir plz make more videos like this plz sir ,we all miss you sir 🙏🙏🙏
@iloveharrypan
@iloveharrypan 11 жыл бұрын
Thank you! This really helped for a presetation I have to do! :)
@umasubu1
@umasubu1 11 жыл бұрын
When Lithium and Beryllium atoms were hit by alpha rays Electrons came out, then what happens to the lithium atom.does it collapse in the absence of neutrons. Also during Rutherford Gold foil experiment when the God foil was hit by alpha rays did Neutrons come out???
@muhammednjie1534
@muhammednjie1534 3 жыл бұрын
I'm really benefiting from this man thanks for your time,how can i follow you in instergram send me the link
@mehrdadpersian9902
@mehrdadpersian9902 6 жыл бұрын
thank you so much for your video, the way you teach is the best
@user-yd7eq4bu5l
@user-yd7eq4bu5l Жыл бұрын
This is class 11 chemistry Now I am 15yrs old This video was uploaded 10yrs before form now that means when I was 5. I was thinking about this how old this video was but good quality and better explanation I had never seen
@bharathchandra3436
@bharathchandra3436 7 жыл бұрын
But I really have a doubt How can Alpha particles kick out neutrons from the 'Be' or 'B' or 'Li'? How can neutrons kick out protons from Wax? First of all Why did Neutrons come out?
@kaustavsengupta8757
@kaustavsengupta8757 5 жыл бұрын
I know it's kinda late to answer but I will try to give answer as short and easy as possible. Well in late 1900 scientist were curious about what are the forces and how they interact with each other. With loads of excellent contribution of various scientist it was determined that in our universe 4 force are present i.e 1. Strong attraction force(nuclear force) , 2. Gravitational force, 3. Electromagnetic forces and last but not least is 4. Weak nuclear force. As per you question alpha particles kicked out of neutrons is because of weak nuclear force. Let me explain every element consistent of proton and neutrons, since all positive charge always repel each other so atom nucleus can't stable right??..No here comes the neutrons to save, you can think of neutrons as charge less but it also acts as cushion so that protons can stay together without rupturing the atoms nucleus. As the heavy the element goes so does the number of protons increases as well as neutrons too. Now comes the trick, there are sometimes when so much positive charge is condense into small space(atom nucleus) that it tend to become unstable due to repulsive force of proton. Since all things in the universe follows law of conservation of energy, to stabilize itself atom nucleus realease energy in form of radioactive (alpha particles, beta, or gamma). Fun fact take example of Uranium. We know Uranium have 2 major isotopes U238 and U-235. U-238 is relatively much stable than latter as it have more neutrons i.e more cushion and glue (stability), where as U-235 have 3 neutrons less and since less cushion and more positive-positive repulsive force which leads to its higher instability and high radioactive. Hope this answers your questions
@kaustavsengupta8757
@kaustavsengupta8757 5 жыл бұрын
@@zakcullen6124 Just to be sure, you want to know how scientist determine that given radioactive decay is by which form i.e alpha particle decay, gamma or beta? Is that your question?
@kaustavsengupta8757
@kaustavsengupta8757 5 жыл бұрын
If you want to know whether decaying is from alpha particle or beta. I think it will be better if you search Wilson Cloud Chamber on KZfaq, I think you will find answer of your question. It will be easier for you to watch rather than reading description analogue of mine.
@kaustavsengupta8757
@kaustavsengupta8757 5 жыл бұрын
@Joseph Park Naah not really there is difference for nuclear explosion you need to have sustainable instantaneous release of all energy. I will advise you to go and check out "Critical Nuclear Mass" on KZfaq or Google. You will come your answers. As far as my interest is concern, yes I have master in molecular biology and we all the time uses small radioactive isotopes to carry out study experiment. If you really want to know how molecular biologist use radioactive isotopes then I will suggest you watch experiment "Hershey-Chase Bacteriophage Experiment" as it is basic of radioactive experiment carryout inside the cell body Moreover python is great for data analysis and for its predictive method machine learning, so we try to use this to effectively collect data of amino acid and other chemical signal and try to make a predictive it's movement through python libraries.
@sidewaysfcs0718
@sidewaysfcs0718 5 жыл бұрын
@Joseph Park No. To cause a nuclear explosion you need a nuclear chain reaction above critical mass to reach explosive kinetics.
@robinjohnson9611
@robinjohnson9611 6 жыл бұрын
just thought i'd say..Sir James Chadwick is my 2 or 3 time great grandfather on my mom's side...makes sense...my brother wanted to be an astrophysicist....pretty interesting stuff..
@momentsofgaming468
@momentsofgaming468 3 жыл бұрын
After seeing thing we come to know that... What you need is a mentor like this to think that what was actually happened to do such discoveries..... Love from India 🇮🇳🇮🇳
@user-yd7eq4bu5l
@user-yd7eq4bu5l Жыл бұрын
Me too from India
@hemanivetytha4679
@hemanivetytha4679 7 жыл бұрын
excellent explanation thanks.plz show some animation also
@iinkkidd3426
@iinkkidd3426 6 жыл бұрын
how does they two become equal hydrogen doesn't got any neutron?
@KaranSingh-ut8cq
@KaranSingh-ut8cq 8 жыл бұрын
Thank you sir an incredible video A question... Why protons would not get shot out of lithium boron or beryllium... Why nutrons??? Because i think +,+ repel so alpha particles and protons repel and that should displace protons from beryllium lithium or boron And also i am curious to ask that what happens to that matter(parafin) after getting its protons out.... I mean its mass or shape or state of matter or something that might haappen to it ???
@satellitesage2487
@satellitesage2487 7 жыл бұрын
Same questions
@pjjacobh9570
@pjjacobh9570 7 жыл бұрын
Helium nuclei isn't neutral, it has 2 protons and 2 neutrons and needs 2 electrons so it's doubly charged .
@pragyanpandey634
@pragyanpandey634 6 жыл бұрын
Neutron is neutral and 2 protons will cancel out the charge of 2 electrons.Therefore making it's K shell complete and a noble gas.
@ekodaoriginals7104
@ekodaoriginals7104 6 жыл бұрын
Pragyan Pandey protons cancelling out means its losing its paraffin wax identity (??!) cuz proton is what that is the most fundamental particle of an atom and if it gets discharged, the wax perhaps turns into something else rather than wax. Here electrons were not shot out therefore, there won't be filling up of any K shell and turn into noble gas or something. Besides, wax is a hydrocarbon?
@ekodaoriginals7104
@ekodaoriginals7104 6 жыл бұрын
That's a smart question, even I wonder, how could he become so sure that it was neutron shooting out, not proton cuz proton-proton repulses and there's a very chance that if protons are shot out then it's gonna have the same action done by neutron kicking out the protons. And the second question of yours, since wax was losing its protons I think it's gonna turn into some other element or at least so like it as proton gives an atom its identity. But again, since it's a complex hydrocarbon, I can't be so sure about it and perhaps, it converts into some other hydrocarbon.
@lovelysingh924
@lovelysingh924 2 жыл бұрын
please make the next video parts of this series
@abdulmananmehnat3587
@abdulmananmehnat3587 6 жыл бұрын
hi Sir i am Fateh Ubaid From Pk if you give a lecture on the network which is made in Solids we will Be thankfull TO you We Love You sir !
@karamalsqoor7292
@karamalsqoor7292 10 жыл бұрын
Thank you for your wonderful efforts I am very like your lesson and you understand
@Amarnath131-2ue
@Amarnath131-2ue 2 жыл бұрын
Where are you from?
@bigdaddytruck3647
@bigdaddytruck3647 2 жыл бұрын
So glad my teacher put a link to this on the powerpoint
@BackStoryDoc
@BackStoryDoc Жыл бұрын
I liked the way of explaining complex theories
@letsmakeiteasy3161
@letsmakeiteasy3161 5 ай бұрын
I don't understand why only protons are coming out from paraffin as neutron can heat other neutron or electron and can kick out those from wax. 2nd That fast moving neutrons of Boron can even come out through empty space of atoms of wax.
@usha8541
@usha8541 2 жыл бұрын
very nice explanation❤
@vijayraghavan8698
@vijayraghavan8698 11 жыл бұрын
why is it that only protrons should shoould come out when nuetrons are emittrd in parafin why not electrons?
@navyatayi6956
@navyatayi6956 6 жыл бұрын
when the neutrons hit the paraffin wax, why dont the neutrons of paraffin shoot out? why do protons only shoot out?
@science-y9209
@science-y9209 6 жыл бұрын
very nice. please make video on discovery of protons
@Alihunayn
@Alihunayn 5 жыл бұрын
Best amongst others ! You are the man who made me interested in chemistry ,which I thought be the most booring subject .Hats of to you!Man......
@maxihawaii4456
@maxihawaii4456 8 жыл бұрын
umm.. how can we be sure that neutrons are of the same size as protons... they can be larger also?
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