The decreasing order of size of isoelectronic series K + , …

Chemistry Classification of Elements and Periodicity Atomic and Ionic Radius Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 14, 2026

The decreasing order of size of isoelectronic series K + , Ca 2+ , Cl – and S 2– is:

K + >Cl – > S 2– > Ca 2+

Ca 2+ > K + >Cl – > S 2–

Ca 2+ > S 2– > K + >Cl –

S 2– >Cl – > K + > Ca 2+

Text Solution

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The correct answer is:

S –2 > Cl – > K + > Ca +2

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