Question

The formal charge on carbon atom in carbonate ion is?

Answer 1

For $C{O}_3{}^{-2}$,

$V=4,N=0,B=8(4$ from $C$ and $4$ from $3O$)

Formal charge on carbon $=4-0-8/2=0$

The formal charge of any atom in a molecule can be calculated by the following equation: $FC=V-N-\frac{B}{2}$