Which of the following electronic configurations is characteristic of alkali metals?

(n - 1) p^{6}, n s^{2}, n p^{1}

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(n - 1) s^{2} p^{6} d^{10}, n s^{1}

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(n - 1) p^{6}, n s^{1}

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n s^{2}, n p^{6}, n d^{1}

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Solution

The correct option is C $(n - 1) p^{6}, n s^{1}$
The outer most shell electronic configuration of alkali metals (IA group elements) is $n s^{1}$ . s-block is filled after p-block of the penultimate shell. Some of the electronic configurations of alkali metals are as follows:

$L i = 1 s^{2} 2 s^{1}$

$N a = 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$

$K = 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{1}$

$R b = 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{10} 4 p^{6} 5 s^{1}$

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Similar questions

(n - 1) s^{2} (n - 1) p^{6} (n - 1) d^{x} n s^{2}

The outer electron configuration of first transition series is ${(n - 1) d}^{1 - 10} {n s}^{1 - 2}$ . Then value of $n$ is:

(n - 1) d^{1} {n s}^{2}

n = 4

n s^{1}

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

H e

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