JEE Main 2018 — Classification of Elements and Periodicity in Properties Question with Solution
JEE Main 2018 (15 Apr)
Question
For and , the correct order of increasing ionic radii is:
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
Isoelectric series:
All have electrons. In the isoelectronic series, the proton/electron ratio decreases, so the size decrease because increases on decrease proton/electron ratio.
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This is a previous-year question from JEE Main 2018, covering the Classification of Elements and Periodicity in Properties chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.