Question

selection rules of electronic spectroscopy?​

Answer 1

Explanation:

1)The total spin cannot change, ΔS=0

2)The change in total orbital angular momentum can be ΔL=0, ±1, but L=0 ↔ L=0 transition is not allowed;

The change in the total angular momentum can be ΔJ=0, ±1, but J=0 ↔ J=0 transition is not allowed