B e^ 2 + is isoelectronic with - Vidyadip

MCQ

$B{e^{2 + }}$ is isoelectronic with

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

✓

Answer

Correct option: C.

$L{i^ + }$

c
$Be ^{2+}$ is isoelectronic with $Li ^{+}$.

Both contain $2$ electrons.

They have an electronic configuration $Be ^2=1 s ^2= Li ^{+}$.

This is equal to the electronic configuration of $He$.

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