Respostas

2014-07-14T22:09:55-03:00
Na - 1s2 2s2 2p6 3s1
Mg - 1s2 2s2 2p6 3s2 
S - 1s2 2s2 2p6 3s2 3p4
Cl - 1s2 2s2 2p6 3s2 3p5
Na + Cl = NaCl
Na + S = Na2S
Mg + Cl = MgCl2
Mg + S = MgS
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