The element having electronic configuration $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{2}$ has valency :

4

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3

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2

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None of these

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Solution

The correct option is A $4$
Electrons in outermost orbital are $4$ so the valency will be $4$ .

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Similar questions

An element has the electronic configuration $1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2} 3 p^{2}$ . Its valency electrons are

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{2}

The valency of the element having electronic configuration 2,8,8,1 is –

3 s^{2} 3 p^{5}

3 s^{1}

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