Question

The formal charges of $N _{(1)}, N _{(2)}$ and $O$ atoms in are respectively

• A. +1, -1, 0
• B. -1, +1, 0
• C. +1, +1, 0
• D. -1, -1, 0

Answer 1

Answer: (B)

Formal charge $=[ $ Total number of valence electrons in the free atom $ ] - [ $ Total number of non-bonding (lone pair)electrons $] -\frac{1}{2}[$ Total number of bonding (shared) electrons $]$

In structure the formal charge on...

the end $N$ atom marked $1$ ,

$=5-4-\frac{1}{2}(4) $

$=5-4-2=-1$

the central $N$ atom marked $2$,

$=5-0-\frac{1}{2}(8)$

$=5-4=+1$

the end $O$ atom,

$=6-4-\frac{1}{2}(4) $

$=6-6=0$