Question

Name the compound formed when an element , A of group 2 combines with an element , B of group 17

Answer 1

the compound formed will be AB2

Answer 2

Answer:

The compound formed is usually is called Halide. Its chemical formula will be AB2.

Explanation:

Since the valency of elements in group 2 is +2 and -1 of elements in group 17, when these two elements react, A will accept 2 ions of B or each B atom will donate 1 ion to A resulting in formation of compound AB2.  Also, Group 17 elements are called halogens and hence their compounds with Group 2 elements are called Halides.