Buatlah konfigurasi elektron dari unsur-unsur berikut A. 12Mg B. 16S C.35Br D. 55Cs

12Mg => [Ne] 3s^2
16S => [Ne] 3s^2 3p^4
35Br => [Ar] 4s^2 3d^10 4p^5
55Cs => [Kr] 5s^2 4d^10 5p^6 6s^1

a. 12Mg= [Ne] 3s²
b. 16S = [Ne] 3s² 4p4
c. 35Br = [Ar] 3d10 4s² 4p5
d. 55Cs = [Xe] 6s¹