B e 2 + is isoelectronic with which of the following ions?

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Question: Answered & Verified by Expert

B e^{2 +}

is isoelectronic with which of the following ions?

ChemistryStructure of AtomNEETNEET 2014

Options:

A $H^{+}$
B $L i^{+}$
C $N a^{+}$
D $M g^{2 +}$

Solution:

1865 Upvotes Verified Answer

The correct answer is:

L i^{+}

Isoelectronic species are those species that have the same number of electrons.

${}_{4}{Be}^{2 +} = 1 s^{2} = 2 e^{-}$

${}_{3}{Li}^{+} = 1 s^{2} = 2 e^{-}$

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