Question

Elements x, y and z have 4, 5 and 7 valence electrons respectively. Write molecular formula of the
compounds formed by these elements individually with hydrogen.

Answer 1

Answer:

Valency of X=8−4=4

Valency of Y=8−5=3

Valency of Z=8−7=1

So molecular formulae of these compounds with hydrogen are  

(a)XH  

4  

(b)YH  

3  

(c)HZ