Question

a Consider only transitions involving the n =1 through n = 4 levels for the hydrogen atom. 

How emission lines are possible, considering only the four quantum levels? 

b Consider only transitions involving the n = 1 through n = 4 energy levels for the hydrogen atom.

Photons of the lowest energy are emitted in a transition from the level with n = _______  to a level with n = _______  

c Consider only transitions involving the n = 1 through n = 4 energy levels for the hydrogen atom. 

The emission line having the shortest wavelength corresponds to a transition from the level with n = _______ to the level with n = _______ 

Answer 1

a)

Following emission lines are possible

4 -> 3

4 -> 2

4 -> 1

3 -> 2

3 -> 1

2 -> 1

There are 6 possibilities

AnswerL 6

b)

For lowest energy, energy difference between two levels should be minimum.

This is true for n=4 to n=3

Answer: 4, 3

c)

For shortest wavelength, energy difference should be maximum,

This is true for n=4 to n=1

Answer: 4, 1