Question

Which of the following are isoelectronic molecules?

• A. $ NO^+ $ and $ F_2 $
• B. $ CO$ and $ O_2^{2-} $
• C. $ CO $ and $ NO^+ $
• D. $ O_2^{2-} $ and $ N_2 $

Answer 1

Answer: (C)

Number of electrons in $CO = 6 + 8 = 14$ electrons.
Number of electrons in $NO^+ = 7 + 8 - 1 = 14$ electrons.
$\therefore CO$ and $NO^+$ are isoelectronic spedes.