Answer to Question #139033 in General Chemistry for Arcenia Eatman

Question #139033
the valence electron molecular orbital configurations for the following, and state whether they will be stable or unstable ions.
(a) Na2 2+
(b) Mg2 2+
(c) Al2 2+
(d) Si2 2+
(e) P2 2+
(f) S2 2+
(g) F2 2+
(h) Ar2 2+
1
Expert's answer
2020-10-19T14:22:44-0400

(1)Na2 2+ electronic configuration is

1s2 2s2 2p5

Valence electrons is 7

Octet is incomplete so the ion is unstable

(2) Mg22+ 1s2 2s2 2p6

Valence electrons 8

Octet is complete so the ion is stable

(3)Al22+ 1s2 2s2 2p6 3s1

Valence electron is one

It is unpaired electron so the ion is unstable

(4)si22+ 1s2 2s2 2p6 3s2

Valence electrons is 2

It is paired electron so the ion is stable

(5)P22+ 1s2 2s2 2p6 3s2 3p1

Valence electrons is 3

Ion is stable

(6) S22+ 1s2 2s2 2p63s2 3p2

Valence electrons is 4

Ion is stable

(7) F22+ 1s2 2s2 2p3

Valence electrons is 5

Ion is stable

(8) Ar22+ 1s2 2s2 2p6 3s2 3p4

Valence electrons is 6

Ion is stable



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