Answer
See the explanation
Work Step by Step
a. Electron configurations for the cations:
1. Sr2+:
Electron configuration of Sr: [Kr] 5s2
Electron configuration of Sr2+: [Kr]
2. Cs+:
Electron configuration of Cs: [Xe] 6s1
Electron configuration of Cs+: [Xe]
3. In+:
Electron configuration of In: [Kr] 4d10 5s2 5p1
Electron configuration of In+: [Kr] 4d10 5s2
4. Pb2+:
Electron configuration of Pb: [Xe] 4f14 5d10 6s2 6p2
Electron configuration of Pb2+: [Xe] 4f14 5d10 6s2
b. Electron configurations for the anions:
1. P3-:
Electron configuration of P: [Ne] 3s2 3p3
Electron configuration of P3-: [Ne] 3s2 3p6
2. S2-:
Electron configuration of S: [Ne] 3s2 3p4
Electron configuration of S2-: [Ne] 3s2 3p6
3. Br-:
Electron configuration of Br: [Ar] 3d10 4s2 4p5
Electron configuration of Br-: [Ar] 3d10 4s2 4p6
