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Question: Answered & Verified by Expert
The set representing the correct order of ionic radii is
ChemistryClassification of Elements and Periodicity in PropertiesJEE Main
Options:
  • A Li +  >  Be 2+  >  Na +  >  Mg 2+
  • B Li +  >  Na +  >  Mg 2+  >  Be 2+
  • C Mg 2+  >  Be 2+  >  Li +  >  Na +
  • D Na +  >  Li +  >  Mg 2+  >  Be 2+
Solution:
2586 Upvotes Verified Answer
The correct answer is: Na +  >  Li +  >  Mg 2+  >  Be 2+
2 + charge cation is smaller in size than 1 + charge cation due to more effective nuclear charge.
Na +  >  Li + (down the group)
Mg 2+  >  Be 2+ (down the group)

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