What is the formal charge on the central atom in ${\mathrm{N}}_2\mathrm{O}?$

 

$\mathbf{N}\equiv \underset{+1}{\mathbf{N}}\to \underset{-1}{\mathbf{O}}$

Formal charge = [Total no. of valence electrons in the free atom] - [Total no- of non- bonding (lone pair) electrons] -1/2 [ Total no. of bonding (shared) electrons]

The formal charge on central O atom i.e., no. 1= + 1