Question

An element x forms the following compounds with hydrogen, carbon, oxygen :
H2X, CX2, XO2, XO3
state the three valencies of element X which are illustrated by these compounds.

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Answer 1

Answer:

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