Question

An element M forms the compound MH2 when it reacts with hydrogen.

(i) find the valency of element M.

(ii) write the valency of chlorine and sulphur and write the formula when they

Reacts with metal M.

iii. Write name and formula of isotopes of hydrogen, also calculate electron proton and neutron in it.​

Answer 1

M=3 It is a non metal

A) M= 3 Valency of M = 3 'M' is Nitrogen ,It is Non metal B) Molar mass of KOH = 30+16+1= 56 No. Of moles = GM/MM =4/56 = 0.071

M=carbon and nonmetal