Sc - -Ar-3d14s2 Ca - -Ar-4s2 Mg - -Ne-3s2 Co-Ar-3d74s2What are the use of writing electronic configuration this fashion-

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Electronic Configuration

Sc - [Ar]3d14...

Question

$\begin{matrix} S c - [A r] 3 d^{1} 4 s^{2} & C a - [A r] 4 s^{2} M g - [N e] 3 s^{2} & C o - [A r] 3 d^{7} 4 s^{2} \end{matrix}$
What are the use of writing electronic configuration this fashion?

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\begin{matrix} S c - [A r] 3 d^{1} 4 s^{2} & C a - [A r] 4 s^{2} M g - [N e] 3 s^{2} & C o - [A r] 3 d^{7} 4 s^{2} \end{matrix}

Question 22

Amongst the following elements whose electronic configuration are given below, the one having the highest ionisation enthaply is

(a) $[N e] 3 s^{2} 3 p^{1}$

(b) $[N e] 3 s^{2} 3 p^{3}$

(d) $[A r] 3 d^{10} 4 s^{2} 4 p^{3}$

H^{-} (b) {N a}^{+} (c) O^{2 -} (d) F^{-}

(a) {3 s}^{1} (b) {2 p}^{3}

(c) {3 d}^{1}

[H e] 2 s^{1}

[N e] {3 s}^{2} {3 p}^{3}

[A r] {4 s}^{2} {3 d}^{1}

K

N e

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