Question: what is the electron configuration for s2-?
Answer: S: 1s2 2s2 2p6 3s2 3p4 S2- : 1s2 2s2 2p6 3s2 3p6 Note: Replacement of 1s2 2s2 2p6 by [Ne] is acceptable. One point is earned for the correct configuration for S. One point is earned for the correct configuration for S2-.