Element X is a metal with a valency 2, Y is a non-metal with a valency 3.Write an equation, to show how Y forms an ion.

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Solution

A metal losses electrons to form a neutral atom whereas a non metal gains electron. As the valency of $Y$ is $3$ , the formation of ion is as follows:
$Y + 3 e^{-} \to Y^{3 -}$

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Element X is a metal with a valency 2, Y is a non-metal with a valency 3.Write an equation, to show how Y forms an ion.

A metal losses electrons to form a neutral atom whereas a non metal gains electron. As the valency of Y is 3, the formation of ion is as follows:Y+3e−→Y3−

A metal losses electrons to form a neutral atom whereas a non metal gains electron. As the valency of $Y$ is $3$ , the formation of ion is as follows:
$Y + 3 e^{-} \to Y^{3 -}$