The element whose electronic conguration is $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2}$ is :

non-metal

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noble gas

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metalloid

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metal

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Solution

The correct option is D metal
The element with electronic configuration $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2}$ is magnesium.

As in outer most shell, it has 2 electrons so it has a tendency to lose its outermost electron.

Hence, it is metal.

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