1. Write the electron configurations for the following (use the rare gas notation for closed shells): a) Sc⁺; b) N^3-; c) Zn²⁺; d) Cu⁺; e) Au³⁺; f) Gd³⁺; g) Ce³⁺.

a) Sc⁺ [Ar]3d²

b) N^3- [Ne]

c) Zn²⁺ [Ar]3d¹⁰

d) Cu⁺ [Ar]3d¹⁰

e) Au³⁺ [Xe]4f¹⁴5d⁸

f) Gd³⁺ [Xe]4f⁷

g) Ce³⁺ [Xe]4f¹