Sodium has $1$ electron in its outermost shell. On moving right by $3$ blocks, how many valence electrons are available and what is name of this element?

3

, Carbon

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4

, Silicon

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4

, Carbon

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3

, Silicon

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Solution

The correct option is B $4$ , Silicon
On moving right by three blocks, three electrons are added in the outermost shell so now the element has four valence shell electrons. The element is silicon which has $4$ outermost shell electrons.

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