Question

If A is from group 2-A and B is from 5-A A reacts with B to form?

Answer 1

Answer:

An element of group IIA has two electrons in the outermost shell which it can lose to achieve inert gas configuration. Hence, its valency is 2. It forms A2+ ions.

An element of group VIA has 6 electrons in its outermost shell. It needs two more electrons to attain inert gas configuration. Hence its valency is 2. It forms B2− ions.

A compound formed between them is AB

A2+ B2−

A2+ B2−

A2+ B2− A++ B−−