Question

The cyanamide ion $\left(NC{N}^{-2}\right)$ isiso electronic with

• A. CN^-1
• B. N₃^-1
• C. NO₂
• D. Ca⁺²

Answer 1

The correct option is B

N₃^-1

Cyanamide ion has 7+ 6+ 7 +2 = 22 electrons and $N_3^{-1}$ has 3$\times$7 +1 = 22 electrons