Question

Which of the following are isoelectronic molecules?

• A. $N{O}^{+}$ and $F_2$
• B. $CO$ and $O_2^{2-}$
• C. $CO$ and $N{O}^{+}$
• D. $O_2^{2-}$ and $N_2$

Answer 1

Answer: (C)

Number of electrons in $CO=6+8=14$ electrons.
Number of electrons in $N{O}^{+}=7+8-1=14$ electrons.
$\therefore CO$ and $N{O}^{+}$ are isoelectronic spedes.