Question

Puțin ajutor,vă rog!

Answer 1

IV.

a) 6e- tip s + 8e- tip p

=> 1s2 2s2 2p6 3s2 3p2 => Z = (2+2+6+2+2) = 14

b)

2e- in substratul 4d

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d2

=> Z = (2+2+6+2+6+2+10+6+2+2) = 40

c)

11 e- in stratul 3

1s2 2s2 2p6 3s2 3p6 4s2 3d2

=> Z = (2+2+6+2+6+2+2) = 22