Identify the neutral element represented by this excited‑state electron configuration, then write the ground‑state electron configuration for that element.

Question

excited state: 1

element symbol:

1s^2 2s^2 2P^0 3s^1

ground state:

Answer 1

The element is Nitrogen. In its neutral state Nitrogen contains 5 electrons and this configuration shows 5 electrons. The ground state configuration is 1s2 2s2 2p1. In the excited state the 2p1 electron absorbed energy and was promoted to the 3s1.