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Q.

The outermost electronic configuration of most electropositive element is

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a

${ns}^{1}$

b

${ns}^{2} {np}^{2}$

c

${ns}^{2} {np}^{5}$

d

${ns}^{2} {np}^{3}$

answer is A.

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Detailed Solution

IA group elements are more electro positive elements. Outermost electronic configuration of IA group elements is ${ns}^{1} .$

Ex: Sodium, Na. Valence configuration, $3 s^{1}$

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The outermost electronic configuration of most electropositive element is