DERIVE an expression for energy change that occurs when electron moves from orbit n1 to n2 and deduce condition for emission or absorption of energy.

Question

anonymous · Answer

$$E=R_{E} (1/n _{f}^{2} - 1/n_{i}^{2})$$

anonymous · Answer

ni is the initial energy level and nf is the final energy level of the electron

anonymous · Answer

Re is rydberg's constant

aravindg · Answer

how u derived it???

anonymous · Answer

it's already derived, wikipedia talks all about it

aravindg · Answer

how u derived it???

aravindg · Answer

.....................

anonymous · Answer

that equation is the energy of a photon being emitted, a general energy equation is E=-Zke^2/2r which you can use at any orbital, subtract and get the difference of energy between the two orbitals

anonymous · Answer

http://en.wikipedia.org/wiki/Bohr_model

anonymous · Answer

These are equations that take days to derive in a classroom so I am not going to attempt to do it here.

aravindg · Answer

k thanx a lot  i hav 2 more questions

anonymous · Answer

ok

aravindg · Answer

Assume that an electron in H atom has been excited to a level n.Determine the maximum no: of emission. lines that can be observed when electron looses energy

aravindg · Answer

carrib???

aravindg · Answer

.............

anonymous · Answer

sorry, it's been a while since Ive done these. I think that if an electron is excited to n level then there will be (n-1)! emission lines