Which of the following transitions are allowed in the H atom? (i)5S to 4P,(ii)4D to 3D,(iii)4D to 3S,(iv)4P to 3S,(v)1S to 2P
A)i,ii,v
B)i,iv
C)i,iv,v
D)iv,v
E)all are allowed

Question

Quizplus · Accepted Answer

(i) 5S to 4P - Allowed because both states have the same parity.
(ii) 4D to 3D - Allowed because both states have the same parity.
(iii) 4D to 3S - Not allowed because the final state has lower energy than the initial state.
(iv) 4P to 3S - Allowed because both states have the same parity.
(v) 1S to 2P - Allowed because the final state has higher energy than the initial state.

Which of the Following Transitions Are Allowed in the H