Question

valency of two elements a and b valency of a is 1 and of b is 2 what is the formula of sulphate a what is the formula of nitrare of b

Answer 1

A2SO4

B(NO3)2

Is the required formulas.

Valency of SO4 is -2

Valency of NO3 is -1

Just cross multiply them as u learnt in class 9th