Question

Which one is an example of an electron being promoted?

2s to 1s

3p to 3s

4s to 5s

3p to 2s

Answer 1

We are looking for lower energy level to higher energy level.

Answer 2

4s to 5s

Answer 3

because
first the s orbit is filled then p

Answer 4

sequence is
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p, 8s, 5g, 6f, 7d, 8p, and 9s

Answer 5

so only
4s to 5s is possible ;)

Answer 6

tanks for the help