Which of the following outer electronic configuration represents argon?

n s^{2}

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n s^{2}, n p^{6}

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n s^{2}, n p^{5}

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n s^{2}, n p^{4}

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Solution

The correct option is C $n s^{2}, n p^{6}$
Option (B) is correct.
Outer electronic configuration represents argon $n s^{2}, n p^{6}$ .
Atomic no. of argon is 18. Its electronic configuration will be $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6}$ .
As the outermost shell is full ( $3 s^{2} 3 p^{6}$ ) it is called noble gas.

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Similar questions

Q. Two p-block elements

x

having (outer shell configuration ns

^{2}

,np

^{3}

and

z

(outer shell configuration ns

^{2}

,np

^{4}

) occupy neighbouring positions in a period. Using this information which of the following is correct with respect to their ionization potential as

I_{x}

and

I_{z}

Two p-block elements x(outer electronic configuration ${n s}^{2}$ , ${n p}^{3}$ ) and z (outer configuration ${n s}^{2}$ , ${n p}^{4}$ ) occupy neighbouring positions in a period. Using this information which of the following is correct with respect to their ionisation potential $I_{x}$ and $I_{z}$ .