The element whose electronic configuration is $1s^{2}, 2s^{2}, 2p^{6}, 3s^{2}$ is Option 1) Metalloid Option 2) Metal Option 3) Noble Gas Option 4) Non-metal

D Divya Saini

As we discussed in concept

S- Block elements -

The elements of group 1 (alkali metal) and elements of group 2 (alkaline metal) which have ns1 and ns2 configuration belong to s-block elements.

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The element with configuration $1s^{2}\:2s^{2}\:2p^{6}\:3s^{2}$ is in group 2 and period 3. It is called magnesium. Elements with this configuration attain noble gas config by losing 2 electrons in 3s arbital. Therefore it is a metal.

Option 1)

Metalloid

This option is incorrect.

Option 2)

Metal

This option is correct.

Option 3)

Noble Gas

This option is incorrect.

Option 4)

Non-metal

This option is incorrect.

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