Identify the element for each of the electron configurations

Identify the element for each of the electron configurations below, and determine whether the configuration is a ground state or excited state: 1s^2 2s^2 2p^6 3s^2 3p^6 3d^8 4s^2 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d For which potential below is this an appropriate n = 4 wave function?

Solution

a) The first configuration is for Nickel (Ni-28) and it is in ground state.

The second configuration is for Rubidium (Rb-37) and it is in excited state.

b) The potential is option (c).