Question

7. X,Y and Z elements have 4, 5 and 7 valence
electrons. Among the given the correct formula is
​

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