GCSE Physics Revision "Alpha-Scattering and the Nuclear Model"
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- เผยแพร่เมื่อ 1 ต.ค. 2024
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In this video, we look at an early model of atomic structure called the plum pudding model. We then look at the alpha-scattering experiment which led to the development of the nuclear model of atomic structure.
This video is based on the AQA spec. If you are following a different exam board then you should check your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks.
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Ernest Rutherford
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Ernest Marsden
S P Andrew Ltd (1921)
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Bust of Democritus
Odysses
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Gold Leaf cropped from original image
Eckhard
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this guys teaches me more in 4 mins than i learn in an hour lesson
exactly!
Yhhh ikrrr but teacher have to teach it slowly and make it hard so they get money and actually not finish things fast bc then they won’t have anything to teach and will just have to waste time lmaoo
@@yuj866 or it’s because of the curriculum and timing it nicely with the tests so they don’t finish too early or too late but it’s how they are meant to teach in school I guess lol
Exactly
@@infinity_sh4816 For SURE LMAO😂😂
This guy has my true respect. He doesn’t do this for money, but solely for helping students
BTW he does get money. From advertisements. He gets a new batch of students every year. Meaning these videos will continue to make money for him.
@@hasnainzaroon6724 they never said he doesn’t get money, they just said he doesn’t DO it for money cuz his main intentions are to help students not make money
Fr
@@hasnainzaroon6724 preach, I'm with you
Wow I'm amazed of the depth and quality and the fact that u stand there not fidgeting
thank you for helping us. god bless
im confused as to why this is also in chemistry.. wtf aqa
Chemistry is the study of matter - the electrons in the outer shell. Physics focuses on what’s inside the nucleus
@@GFMkidsComedy yh correctly especially in A level physics you have to work out the mass of the neutron and the distance between the protons
Re we required to know the names of the guys like JAMES CHADWICK
Yes
We are i think
Muna Ali Yes, you're supposed to know Rutherford - alpha particle scattering experiment, Niels Bohr - discovered shells, James Chadwick - discovered neutrons, and that's it I think, but there might be more
@@sovietgiraffe5380 we have to know this for GCSE!!! We havent been taught this yet...
Roshan-Abbas Manji dont have to worry about that anymore
i have learnt more about chemistry in two days then 3 years with my chemistry teacher. Thanks so much
2:05 was slick, he timed that perfectly
He ate that
Our teacher at school told us a lot of information which I'm not a hundred percent sure if it's true or not. She mentioned using short sharp bullet points for a lot of questions. For example, a 6 mark question. Is she correct? It's just that she's been wrong numerous times; your an amazing Science teacher and thought maybe getting your opinion would clear things up a bit. Thank you!
ArticWolfNightcore it is right but you would need to cover all the points
The bullet points are just to make your answer more concise
Give this man a knighthood
bro the gold looks like chocolate lol😂
Hello and thank you for all these wonderful videos , just wondering do we have to know all the dates for the discoveries ? ( eg 1897 electron was discovered )
Hi and thanks for the comment. No I don't think they'll ever ask you for any dates in the exams (the dates are not mentioned in the spec).
Thank you!
@Cara Wilson It doesn't matter about the dates, as he just said, focus on the content :)
@@Freesciencelessons what spec do you teach?
@@BlenderModelstop bc in my last mock u had to match the dates to when the neutron proton all that were discovered and I was gobsmacked (i do aqa)
he can teach me more in five minutes on youtube than i can learn in an hour at school.
Do we need to remember all the scientist names?
yes its best if you do cause i had a question asksking the difference between these old lot
You are truly one of the best people on this Earth
thank u sm for everything u do!!!
I love your videos god bless sir!!!! You always save my grades lol ❤❤❤❤❤❤
who is here for tomorrow?
Im here for tomorrow xd
Hello
I would like to ask you if you have included everthing about this topic or do i need to study it from a revision book?
He has included everything, but recording on your own too well help
So because I’m in quarantine I wanted to learn something. I found that learning from GCSE revision videos like this make learning a lot easier and this is a good example.
Thanks for the comment, I appreciate it.
I just wanted to ask, If I'm asked about the nuclear model in the exam, am I going to be asked about the current one (new one at the time) or the first one to be made?
I would assume that you would be asked about the current one. Unless your educators state that they would like the first model
Ur getting me though life.
Hi sir, on the AQA website it says ‘details of Chadwicks experimental work is not required’ but you’ve included this in your video? I’m confused
Hi. I didn't describe Chadwick's experiment. This video is about the alpha-scattering experiment which was carried out by several researchers working with Ernest Rutherford in Manchester.
Freesciencelessons okay thank you sir, but I thought the proton and neutron discovery was Chadwicks work. Will the examiners ask about the discovery of the electron, proton and neutron ?
Hi. Chadwick discovered the neutron but not the proton. You are required to know that. However, you are not required to know who discovered the electron or the proton. In the exam, they can give you information to read and then answer questions on. So even though you are not required to know who discovered the proton or electron, you could be given information and asked questions on it.
How does the alpha particles being deflected necessarily mean that the positive charge was at the center of the atom?
When two positive charges meet, such as the positive Alpha particles, they repel each other. This means the Alpha particles being deflected when hitting the direct centre of the atom is proof that the centre contains a concentration of positively charged mass.
Alpha particles are positive and like charges always repel
hellloooo 10a6 science class 😎🤓😰🤯😀
4:38
this dude teaching a video about my brain
What an icon
It's ion
hello sir
just wondering, do we need to know WHO discovered what. e.g Chadwick discovered that the nucleus also contained neutrons
Hi. That's a good question. All of the information, such as the names of discovers are actually in the spec. That means that they could be asked at some point. 40% of the exam marks will come from demonstrating knowledge / understanding.
@@Freesciencelessons can you tell me the names please
Which is the most recent, used and correct model
The nuclear model
Because the centre of the atom has a positive charge, shouldn't the alpha particle bounce back instead of deflecting due to a force of repulsion?
yeah that did happen - some of the alpha particles did deflect but because the atom was made of lots of empty space, some of the alpha particles went thru the atom and didn't come into contact with the nucleus
Anika Mehra
I think your slightly getting mixed up.
The alpha particles become deflected if they are in close range of the nucleus.(so they havent hit it)
The bounce back if they do hit the nucleus.
you are my saviour
aghh this topic is so confusing and i have exam on it in a couple of weeks and im only on the third video
do we need to know the years?
no, ur not tested on the years, I'm pretty sure it's only the content
No
Is the nuclear model the same as Bohr's development?
The nuclear model was proposed from the alpha scattering experiment. Bohr refined the model by explaining the location of the electrons.
@@Freesciencelessons Ohh thank you very much for explaining.
how were neutrons discovered then?
James Chadwick
nice
i love you
My favourite science channel
for the exam do we have to know the exact dates and the discoveries that happened at those dates
thanks for the help btw
we dont need dates
My chem teacher said not in chem but she’s not sure abt physics
💝💖💕🥰
Do your videos contain everything on the specification?
Ellie A I think they do x
Milly And Bailey, thankyou :)
Do we have to know the names of the scientists?
@Freesciencelessons what spec are you?
Pause it at 0:12
Spider: crawls near me
Me:
??
what?
??
Thank you for this learning material
😝
hi Im just wondering would we ever get asked who came up with the plum pudding idea?
This question is unlikely to come up, but just in case it is Sir Joseph John J.J. Thomson
yes
this is when i was born
amazing vid bro#
thanks man really helped me
is this needed for ocr?
this is the aqa specification
yooo 10x2 science class with miss brennan
From a researcher to another one: I have to say that I really enjoy your lessons. They are well structured, clear and I enjoy watching them. I also understand that you do not want to introduce too many concepts so that the lessons are easily understood and remembered. Nevertheless, I really dislike the fact that in all English schools, the scientists names are not even mentioned. This makes the subject really "arid and barren". Science has been developed through centuries by people that have dedicated their lives to this beautiful subject: why not mentioning the name J.J. Thompson who discovered the electrons and introduced the Plum-Pudding model or E. Rutherford who ran the Alpha scattering experiment with his researchers, Marsden and Geiger. What I am saying is not a criticism to you, Sir, but to the UK system of education and I'd like to have your opinion on this. In other countries like France, Germany and Italy, Scientists names are well studied in schools. It is funny and sarcastic if one thinks that most of the science that our students learn in our schools were British. Where is the acknowledgement to those that have built this subject over countless years of hard work? Thank you for your great channel
As someone who went to School in England, I recall quite vividly being taught the names of the scientists who developed the models for that atom, and it even came up on the offcial exam, which the enitre country doing the course, will do. I remember qutie well a trick to remember one of the names that i was taught early on, that being of James Chadwick, who discovered the neutron, what my teacher at the time said was "the way I remember it is, Jimmy Neutron, Jimmy is an alternative way of saying James, and there is a character called Jimym Neutron and the Neutron was discovered by James Chadwick". Furthermore as a more relevant example. The experiment mentioned in this video was often referred to as the "Rutherford Experiment" or the "Geiger-Marsden experiment"
Don't disrespect my boy Dr Shaun without knowing the full story, he did mention their names in his other videos, I'm guessing the one about the development of the atom and also the periodic table. And yes sure the names of those who have made discoveries are important, but what's more important and what should be focused on more is how their discoveries cause a change and impact on the basis of science and the ideologies behind the discoveries. So yes I do think it's very important these legends get the appreciation they deserve but not in terms which affect the grades, jobs and even lives of millions of students, names should not determine or even affect something this important so in my opinion it should not be included into GCSEs or even testing unless you choose to do this.
thats epic bro
Is Werner Heisenberg important?
In Physics yes but he's not on the AQA GCSE spec.
Heisenberg from Breaking Bad