# Question

For each of the following atomic transitions, state whether the transition is allowed or forbidden, and if forbidden, what rule is being violated;

(a) 4p → 3p;

(b) 2p → 1s;

(c) 3d → 2d;

(d) 4d → 3s;

(e) 4s → 2p.

(a) 4p → 3p;

(b) 2p → 1s;

(c) 3d → 2d;

(d) 4d → 3s;

(e) 4s → 2p.

## Answer to relevant Questions

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