I know how to do the ground state for them
The ground sate for hydrogen is 1s
Helium is 1s
neon is 1s2, 2s2, 2p6
i think murcury is 1s2,2s2, 2p6,4s2,3d10,4p6,5s2,4d10,5p6,6s2,td10
I just dont know how to do the sublevel excited sate electron configuration
