Question

(A) Write the names and symbols of the constituent elements and identify their valencies from

the molecular formulae given below. Na2S. HI, CaKe, HBr​

Answer 1

Explanation:

Na = +1 - sodium

S. = +2 - sulphur

H = ±1 - hydrogen

I = -1 - iodine

Ca = +2 - calcium

Br = -1 - bromine