Question

what is valency and valence electron

Answer 1

The valency of an element can be defined as the number of electrons it needs to gain or lose to form a stable compound with atoms of other elements. For the metals, the valency is equal to the number of electrons in the outer shell and for non-metals, the valency is equal to 8–no. of electrons in outermost shell.

Valence electrons are the electrons present in the outermost shell of an electron.

For example: the electronic configuration of chlorine is 2,8,7.

It has 7 valence electrons and valency is 8–7=1

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Answer 2

hiii,

Valency is the number of electrons a atom needs to loss or gain in order to have a full outermost energy level.

Valence electrons are the number of electrons in the outermost energy level of a atom

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