Homework Answers
The cations has positive charges which are metals.
The anions have negative charges that are non-metals.
For AX2 ,
Cation should be A2+ and anion should be 2 X-
So A2+ should belong to group 2 A such as Mg2+
and X- should belong to Group 7A with -1 charge such as Cl-.
So the correct option should be (a) A is a metal from Group 2A and X is a non metal from Group 7A
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