JEE Main Chemistry question

The chloride ion is isoelectronic with potassium. The size of chloride ion is:

(A)Larger than ionCorrect
(B)Smaller than ion
(C)Same as that of ion
(D)None of these

Answer: (A)

Solution

(18 electrons, 17 protons) and (18 electrons, 19 protons) are isoelectronic, but has two more protons pulling on the same number of electrons, giving it a higher

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Question ID VK-137939