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Which of the following metal is not an alkali metal?(a) magnesium(b) rubidium(c) sodium(d) caesiumI 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

Answer» 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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