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Which of the following metal is not an alkali metal?

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in Chemistry – Class 11 by (148k points)
Which of the following metal is not an alkali metal?

(a) magnesium

(b) rubidium

(c) sodium

(d) caesium

I have been asked this question by my school teacher while I was bunking the class.

My question is from s-Block Elements topic in portion s-Block Elements of Chemistry – Class 11

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Right answer is (a) magnesium

Explanation: Alkali metals are the elements of group 1. The outer shell configuration of group 1 elements is ns^1, where n is the number of it’s period. Magnesium is not an alkali metal because it’s outer shell configuration is ns^2.

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