Question

What is the formula of binary compound formed between combination of

(a) 1^st element of 1^st group and iodine 

(b) 2^nd element of 2^nd group and 1st element of 17th group

Answer 1

(a) 1^st element of 1^st group = H

Binary compound = HI

(b) 2^nd element of 2^nd group = Mg

1 ^st element of 17^th group = F

Binary compound = MgF₂