MHT CET 2022 Chemistry question

Chemistry Classification of Elements and Periodicity in Properties MHT CET 2022

Identify the element having smallest atomic radius from following

(A)Ar
(B)P
(C)Si
(D)ClCorrect

Answer: (D)

Solution

Si, P and Cl belong to the third period. Across a period the nuclear charge increases while the electrons are added to the same shell, so the atomic (covalent) radius decreases from left to right: Si (111 pm) > P (106 pm) > Cl (99 pm).

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Question ID VK-094138