Question

The electronic configuration of an atom of element X is 2,8,2 what will be the valency of the element x

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Answer 1

The element is Magnesium

• It has total 12 electrons

it has electronic configuration

`\\ \sf\longmapsto 2,8,2`

or

`\\ \sf\longmapsto 1s^22s^22p^63s^2`

In valence cell it has 2 electrons and therefore its valency is 2