Question

Based on the group valency of elements write the molecular formula of

the following compounds giving justification for each:

(i) Oxide of first group elements.

(ii) Halide of the elements of group thirteen, and

(iii) Compound formed when an element, A of group 2 combines with an

element, B of group seventeen.​

Answer 1

Answer:

this is the answer of 1 2 and 3