CHM 501

4. Find the electron configuration for the following species: S, S2–, W, W+, Ni2+, Ce3+, Os, Eu.

Answer

S: [Ne]3s23p4

S2–: [Ne]3s23p6 = [Ar]

W: [Xe]6s24f145d4

W+: [Xe]4f145d5

Ni2+: [Ar]3d8

Ce3+: [Xe]4f1

Os: [Xe]6s24f145d6

Eu: [Xe]6s24f7