Question

Which of the following are isoelectronic?

Answer 1

Answer:

The correct answer is option C.

Explanation:

Isoelectronic species are those atoms or ions which same number of electrons.But they differ in physical and chemical properties.

Atomic number of nitrogen atom is 7.

$[N]=1s^22s^22p^3$

$[N]^{3-}=1s^22s^22p^6$

Number electron in nitride ions = $N^{3-}=10$

Atomic number of oxygen atom is 8.

$[O]=1s^22s^22p^4$

$[O]^{2-}=1s^22s^22p^6$

Number electron in oxide ions = $O^{2-}=10$

$[Ne]=1s^22s^22p^6$

Number of electrons neon = $Ne=10$

Hence, $N^{3-} , O^{2-} \& Ne$ are isoelectronic.