JEE Main Chemistry question

Increase in atomic size down the group is due to [BCECE 2008]

(A)Increase in number of electronsCorrect
(B)Increase in number of protons and neutrons
(C)Increase in number of protons
(D)Increase in number of protons, neutrons and electrons

Answer: (A)

Solution

On descending a group, a new principal electron shell is added with each period, i.e. the number of electrons (and the shells they occupy) increases, and this shell addition increases atomic size despite the simultaneously increasing nuclear charge. An increase in protons/neutrons alone (without

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Question ID VK-133129