1.

Search more atoms, which complete their octet during chemical combinations.

Answer»

In compounds like KCl, MgCl2, CaO, NaF, etc, 

The constituent atoms complete their octet by lose or gain of electrons.

e.g. K → K+ + e-

Cl + e- → Cl-

K+ + Cl- → KCl

[Note : Students are expected to search more atoms on their own.]



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