Be2 + is isoelectronic with which of the following ions?

Question

Be2 + is isoelectronic with which of the following ions? (A) Na+ (B) Li+ (C) Mg2 + (D) H+

Tardigrade Admin · Accepted Answer

As Li+ and Be2 + both have 2 electrons so they are iso electronic. Rest other ions have different number of electrons than Be2 + so there is no relation between them. Na+ , Mg2 + both have 10 electrons.

Q. $B e^{2 +}$ is isoelectronic with which of the following ions?

$N a^{+}$

$L i^{+}$

$M g^{2 +}$

$H^{+}$

As $L i^{+}$ and $B e^{2 +}$ both have 2 electrons so they are iso electronic. Rest other ions have different number of electrons than $B e^{2 +}$ so there is no relation between them. $N a^{+}$ , $M g^{2 +}$ both have 10 electrons.

Q. Be2+ is isoelectronic with which of the following ions?

Na+

Li+

Mg2+

H+