The pair, in which ions are isoelectronic with Al³⁺... | Atomic Structure

JEE MAIN 2022

25-06-22 S1

Question

The pair, in which ions are isoelectronic with $\mathrm{Al}^{3+}$ is :-

Select the correct option:

$\mathrm{Br}^{-}$and $\mathrm{Be}^{2+}$

$\mathrm{Cl}^{-}$and $\mathrm{Li}^{+}$

$\mathrm{S}^{2-}$ and $\mathrm{K}^{+}$

$\mathrm{O}^{2-}$ and $\mathrm{Mg}^{2+}$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

Isoelectronic species have same no. of electrons $\mathrm{Al}^{3+}, \mathrm{O}^{2-}, \mathrm{Mg}^{+2}$ all have 10 electrons.

Question Tags

JEE Main

Chemistry

Easy

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