Complete the Table
Element Subshell electronic configuration No. of electrons present in the last subshell Group number
$L i$ $1 s^{2} 2 s^{2}$ $1$ $1$
$N a$ $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$ - $1$
$M g$ $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2}$ - $2$
$C a$ $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 s^{2} 3 p^{6} 4 s^{2}$
- -

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Solution

Element Subshell electronic configuration No. of electrons present in the last subshell Group number
$L i$ $1 s^{2} 2 s^{2}$ $1$ $1$
$N a$ $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$ $1$ $1$
$M g$ $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2}$ $2$ $2$
$C a$ $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 s^{2} 3 p^{6} 4 s^{2}$
$2$
$2$

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Similar questions

Element	Subshell electronic configuration	No. of the outer most shell	Period number
$_{4} B e$	$1 s^{2} 2 s^{2}$	$2$	$2$
$_{6} C$	$1 s^{2} 2 s^{2} 2 p^{2}$	$2$	$2$
$_{11} N a$	$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$	$3$	-
$_{19} K$	$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{1}$		-

{1 s}^{2} {2 s}^{2} {2 p}^{6} {3 s}^{2} {3 p}^{6} {4 s}^{2}

The electronic configuration of Ti is 1 $s^{2}$ 2 $s^{2}$ 2 $p^{6}$ 3 $s^{2}$ 3 $p^{6}$ 3 $d^{2}$ 4 $s^{2}$ and it represents

1 s^{2}

2 s^{2}

2 p^{6}

3 s^{2}

3 p^{6}

3 d^{5}

4 s^{2}

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{5} 4 s^{1}

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Element	Subshell electronic configuration	No. of electrons present in the last subshell	Group number
$L i$	$1 s^{2} 2 s^{2}$	$1$	$1$
$N a$	$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$	-	$1$
$M g$	$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2}$	-	$2$
$C a$	$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 s^{2} 3 p^{6} 4 s^{2}$	-	-