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Question: Answered & Verified by Expert
$\mathrm{Na}^{+}$ion is isoelectronic with
ChemistryStructure of AtomJEE Main
Options:
  • A $\mathrm{Li}$
  • B $M g^{+2}$
  • C $\mathrm{Ca}^{+2}$
  • D $\mathrm{Ba}^{+2}$
Solution:
2874 Upvotes Verified Answer
The correct answer is: $M g^{+2}$
Electrons in $\mathrm{Na}^{+}=11-1=10$
Electrons in $\mathrm{Mg}^{2+}=12-2=10$

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