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An element X forms the following compounds with hydrogen, carbon and oxygen :H2X, CX2, XO2, XO3State the three valencies of element X which are illustrated by these compounds.
H2X:
Element/Ion H X
Valency 1 2
To stabilize the compound with hydrogen, two atoms of X are required. Therefore, the valency of X in this compound is two.
CX2:
Element/Ion C X
Valency 4 2
To stabilize the compound with carbon, two atoms of X are required. Therefore, the valency of X in this compound is two.
XO2:
Element/Ion X O
Valency 4 −2
To stabilize this compound with oxygen, four atoms of X are required. Therefore, the valency of X in this compound is four.
XO3:
Element/Ion X O
Valency 6 −2
To stabilize this compound with oxygen, six atoms of X are required. Therefore, the valency of X in this compound is six.
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