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Energy levels question


Millan

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Hi:

 

a) an atoms electron is in the ground state (-4.11*10^ -17). An electron with ke 5*10^-17 collides with the atom, what happens to the energy.

 

b) What could subsequently happen to the electrons in the higher energy levels

 

help plz

 

Yes energy = - 4.11E-17 J

 

my mistake lol

 

I think the answer is that the atom gets ionised and the remaining enegry becomes the KE of the free electron.

 

but im confused as to the words 'what happens to the ENERGY' (is it just absorbed by the electron in the ground state and the rest goes to KE)

 

and part b) i think it is the electrons drop down energy levels emmiting light - photons with discrete frequencies hence discrete wavelengths.

 

but the questions says 'subsequently' , so im not sure if its right or is its just there to put you off.

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This is a question from the AQA (I think) Physics module 1 paper isn't it? I sat that the other week. That's pretty much what I put for a) and b). I mentioned something about work being done by the electron in leaving the atom, there being an increase in potential energy and decrease in kinetic as it escapes.

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whats philosophy like (btw do you go on the student room)

 

Philosophy isn't too bad. So far we've covered Ancient Greek philosophy (Plato, Aristotle and Socrates), Judeo-Christian concept of God and Meta-/Normative-Ethics, that's the first module. At the moment we're doing Kantian ethics (Catagorical Imperative) and religious philosophy. It starts off a bit tedious but looks interesting for the rest of AS and A2.

 

Student room?

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