I love the way you created the lego model to show that electrons must reside at a quantised energy level. It's inspired! All your videos are really clear, and you're a great teacher - keep them coming!
+Paul Biechmann Thanks. There are analogies about balls that sit on stairs - but the limitation is that each energy level is exactly the same distance apart. Lego is great and I feel that it can really help explain some tricky concepts.
Brilliant video - solid explanation, however if asked how many energy states there were associated with that atom, would you include the 0eV state? Since technically it is a state for the electron to exist in, but it has become delocalised and therefore not associated with that atom anymore. Been bugging me for a while now.
i have read electrons are excited by collision with "free electrons" what are "free electrons" in atoms, when electrons should always be contained withing its discrete energy level?
Hello, could you please explain what you mean by saying that the outermost shell is a bit like infinity? I understand that this shell represents the energy needed to create an ion, but I do not understand why it is like infinity.. Also, would it be wrong to set the ground state of an electron (the first shell) to have 0 eV - as it is the lowest energy state it can appear in? Thank you for your fantastic vidoes! :-)
Hi! Can an electron absorb energy and go directly from the ground state to the energy level 0, n=infinity? or directly emit energy and pass from n=infinity to the ground state. Is that possible? or does It have to go through the other energy levels first?
What happens to an electron that has enough energy to excite to a higher energy level but also has excess energy, though not enough to excite to a further energy level- can the electron still excite to the original level or does it have to have the EXACT amount of energy equal to the energy difference in the transition levels?
Why does each shell have a negative amount of energy? I get that the atoms become ions at the highest energy level but I don't get why all the other shells have a negative value.
+Izzy Manuel When an electron is completely removed from the atom it then has no energy (so the energy level for the outermost shell must be equal to zero). But you have to give an electron a certain amount of energy to it to raise its energy as it moves to a higher level. You keep giving it a positive amount of energy until it eventually has zero energy. That's where the negative sign comes from. Does that make sense?
Oh, yes I get it, so basically you have to give the electron energy in order for it to reach zero, and when it is emitted the electron has no energy? but still has a charge?
+A Level Physics Online Basically what you are talking about is the potential energy of the electron, at the bottom of its energy well, it's P.E is highly negative. It increases until it's 0 at escape.
+Samie Mohammed You won't be. Often you have a simple diagram with maybe four or five energy levels and a single electron - perhaps you need to identify the smallest or largest energy change.
It’s the ionisation energy the amount of energy needed for particle to become a ion It’s also negative because it’s the opposite do you get sorrry not the best at explaining
the Lego model for energy levels? Abso lute ly brilliant!
A O M Mushfeque Un Nabi Thanks. Made sense to me.
10/10 teaching style ..👌
YUP, he is amazing :D
I love the way you created the lego model to show that electrons must reside at a quantised energy level. It's inspired! All your videos are really clear, and you're a great teacher - keep them coming!
+Paul Biechmann Thanks. There are analogies about balls that sit on stairs - but the limitation is that each energy level is exactly the same distance apart. Lego is great and I feel that it can really help explain some tricky concepts.
clear explanation. concise. visual learners will appreciate the lego model. 10/10
Oh my goodness! I can tell you worked hard on this- this is brilliant. Do make more gcse and a level science videos like this! :)
He has them on his channel:). Have fun
Excellent little video... really helps with follow up after lessons. Thank you!!
I never skip adverts on your video
makes so much sense♣
Brilliant tutorial! Fantastic video! Wow!
a very nice video, it helped me a lot, thank uuu
Thankyou for such a clear video!
Brilliant video - solid explanation, however if asked how many energy states there were associated with that atom, would you include the 0eV state? Since technically it is a state for the electron to exist in, but it has become delocalised and therefore not associated with that atom anymore. Been bugging me for a while now.
i have read electrons are excited by collision with "free electrons"
what are "free electrons" in atoms, when electrons should always be contained withing its discrete energy level?
Which A-levels did you do sir? Btw I love your videos!
In one video he said he did Maths, Chemistry, Physics and Extended maths.
Might not be chemistry; need to double check that one.
Are the energies for each level the energy required to raise the electron to the next level or to free it completely from the atom??
How did you determine 13.6 eV as the lowest enegy required?
+Daniyal Hassan I just used that as an example. The data like this will be provided for you in a question.
Hello, could you please explain what you mean by saying that the outermost shell is a bit like infinity? I understand that this shell represents the energy needed to create an ion, but I do not understand why it is like infinity..
Also, would it be wrong to set the ground state of an electron (the first shell) to have 0 eV - as it is the lowest energy state it can appear in?
Thank you for your fantastic vidoes! :-)
Hi! Can an electron absorb energy and go directly from the ground state to the energy level 0, n=infinity? or directly emit energy and pass from n=infinity to the ground state. Is that possible? or does It have to go through the other energy levels first?
It's only possible theoretically if we can find a source of light that provides that much energy to it. As if stands the E.M spectrum does not.
What happens to an electron that has enough energy to excite to a higher energy level but also has excess energy, though not enough to excite to a further energy level- can the electron still excite to the original level or does it have to have the EXACT amount of energy equal to the energy difference in the transition levels?
+Rinor Sylejmani The electron would then not be excited to the higher level. It either absorbs all the energy exactly or none at all.
Ah, ok. Thanks for the quick reply.
is it atom or electron which is excited or both when an atom on particular element absorbs photon energy.?
You're right GCSE Chemistry is a lie. Hence I am currently doing A-level Chemistry to find out the truth lol
Lol, you might find some things you study in A level untrue in future
@@armuhammad2148 Yh ik but atleast it's much accurate when compared to GCSE!
Why does each shell have a negative amount of energy? I get that the atoms become ions at the highest energy level but I don't get why all the other shells have a negative value.
+Izzy Manuel When an electron is completely removed from the atom it then has no energy (so the energy level for the outermost shell must be equal to zero). But you have to give an electron a certain amount of energy to it to raise its energy as it moves to a higher level. You keep giving it a positive amount of energy until it eventually has zero energy. That's where the negative sign comes from. Does that make sense?
Oh, yes I get it, so basically you have to give the electron energy in order for it to reach zero, and when it is emitted the electron has no energy? but still has a charge?
It still has a charge
+A Level Physics Online Basically what you are talking about is the potential energy of the electron, at the bottom of its energy well, it's P.E is highly negative. It increases until it's 0 at escape.
how do you know which steps the electron can make?
thank you
if your asked to draw all the possible transitions how am i meant to tell how many transitions there are
+Samie Mohammed You won't be. Often you have a simple diagram with maybe four or five energy levels and a single electron - perhaps you need to identify the smallest or largest energy change.
is this in the year 1 mock part of the new a level syllabus? (OCR) I cant find it in the book?
It was in the old spec, but for the new spec OCR exams it is now taught in year 13 alongside the astrophysics.
How do u get -13.6
It’s the ionisation energy the amount of energy needed for particle to become a ion It’s also negative because it’s the opposite do you get sorrry not the best at explaining
Matt Anderson is somehow more to follow, but nevertheless thanks.
Here from Mr Tuggey
I really don't understand... sorry.,
need to explain slowly mate;goin too fast(
thank you