Question

an element X forms the following compounds with hydrogen, carbon and oxygen: H2X, CX2, X2O and X2O3. what are the valencies of element X exhibited by these compounds

Answer 1

1 2 and 3 are the valencies of X
in 1 ,2 the valency is 2
in 3 the valency is 1
and in 4 the valency is 3

Answer 2

Answer:

h2x=2

cx2=2

xo2=4

xo3=6