a) 1s2,2s2,2p6,3s1

K2,L8,M1

b) 1s2,2s2,2p6,3s2,3p5

K2,L8,M7

Explicação:

c) 1s2,2s2

K2,L2

d) 1s2,2s2,2p6,3s2,3p6,4s2,3d10,4p6,5s2,4d10 5p1

K2,L8,M18, N18, O3

e) 1s2,2s2,2p6,3s2,3p1

K2,L8,M3

f) 1s2,2s2,2p6,3s2,3p6,4s2

K2,L8,M8,N2

h) 1s2,2s2,2p6,3s2,3p6,4s2,3d8

K2,L8,M16,N2

i) 1s2,2s2,2p6,3s2,3p6,4s1

K2,L8,M8,N1

j)Co²+

1s2,2s2,2p6,3s2,3p6,3d7

K2,L8,M15

k) Co³+

1s2,2s2,2p6,3s2,3p6,3d6

K2,L8,M14

l)S²-

1s2,2s2,2p6,3s2,3p6

K2, L8, M8