Choose all resonance structures of ocn - with right formal charges in each. check all that apply.

Formal charge on an element in a molecule is calculated by using following formula,

Formal Charge = [# of Valence Electrons] - [Electrons in Lone Pairs +

1/2 the # of Bonding Electrons]

Example:

Let's calculate the formal charge present on Oxygen atom in Structure 1. The oxygen atom has,

6 Valence shell electrons

2 Bond Pair Electrons

6 Lone pair Electrons

So,

Formal Charge = [6] - [6+2/2]

Formal Charge = 6 - 7

Formal Charge = - 1

You can calculate formal charges on all atoms in all three structure. I have drawn the structures with formal charges.