MHT CET 2022 Chemistry question

Chemistry Classification of Elements and Periodicity in Properties MHT CET 2022

Which among the following elements develops noble gas configuration in +1 state?

(A)FrCorrect
(B)Ca
(C)Mg
(D)Sr

Answer: (A)

Solution

An atom attains noble gas configuration on losing its valence electrons only when it has one valence electron, i.e. it is an alkali metal (group 1). Francium is , so has the

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Question ID VK-094273