Fundamentholfundamenthol
JEE Main2019Chemistry
Q.

The isoelectronic set of ions is :

  1. A

    N3–, Li+, Mg2+and O2–

  2. B

    Li+, Na+, O2–and F–

  3. C

    N3–, O2–, F–and Na+

  4. D

    F–, Li+, Na+and Mg2+

Solution

Atomic numbers of N, O, F and Na are 7, 8, 9 and 11 respectively. Therefore, total number of electrons in each of N3-, O2–, F– and Na+ is 10 and hence they are isoelectronic.

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