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JEE · NEET Previous Year Question

$The group having isoelectronic species is:$

Topic: JEE PYQ

Answer: D. Full step-by-step solution below.

A $O^{-}, F^{-}, Na, M g^{+}$
B $O^{2-}, F^{-}, Na, M g^{2 +}$
C $O^{-}, F^{-}, N a^{+}, M g^{2 +}$
D $O^{2-}, F^{-}, N a^{+}, M g^{2 +}$

Correct answer: D

Solution

(d) Isoelectronic species O^{2-}, F^{-}, N a^{+}, M g^{2 +} (All contain 10 electrons)

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