MHT CET 2022 Chemistry question

Chemistry Classification of Elements and Periodicity in Properties MHT CET 2022

Identify the element having highest ionization enthalpy

(A)LiCorrect
(B)K
(C)Rb
(D)Cs

Answer: (A)

Solution

Li, K, Rb and Cs are alkali metals of group 1. Ionization enthalpy decreases down the group because atomic size increases and the outer electron is farther from the nucleus and better shielded.

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Question ID VK-094426