The formal charge of an atom in a polyat...

The formal charge of an atom in a polyatomic molecule or ion may be defined as the difference between the number of valence electrons of that atom in an isolated or free state and the number of electrons assigned to that atom in the Lewis structure. It is expressed as :
`[{:("Formal charge [F.C]"),("on an atom in a Lewis"),("structure"):}]=[{:("Total number of valence"),("electrons in the free"),("atom"):}]`
`-[{:("Total number of non-"),("bonding (lone pair)"),("electrons"):}]-((1)/(2))[{:("Total number of"),("bonding shared"),("electrons"):}]`
Find the formula charge on ''O'' atom in given structure (I) and (II) respectively:
(I) `:overset(..)underset(..)O-C-=N:" (II)":underset(..)O=C=N:`

`-1,-1`

`-2,0`

`-1,0`

`0,-1`

Verified by Experts

The correct Answer is:

`.^(Theta)underset(-1)O-underset(0)C-=underset(0)N" "underset(0)O=underset(0)C=underset(-1)N^(Theta)`

CHEMICAL BONDING-I
GRB PUBLICATION|Exercise Comperhension Type-18|1 Videos
CHEMICAL BONDING-I
GRB PUBLICATION|Exercise Comperhension Type-19|1 Videos
CHEMICAL BONDING-I
GRB PUBLICATION|Exercise Comperhension Type-16|1 Videos
CARBOXYLIC ACID AND DERIVATIVES, AMINES AND OTHER NITROGEN COMPOUNDS
GRB PUBLICATION|Exercise Subjective type|19 Videos
CHEMICAL KINETICS
GRB PUBLICATION|Exercise Subjective Type|63 Videos

The formal charge of an atom in a polyatomic molecule or ion may be defined as the difference between the number of valence electrons of that atom in an isolated or free state and the number of electrons assigned to that atom in the Lewis structure. It is expressed as : [{:("Formal charge [F.C]"),("on an atom in a Lewis"),("structure"):}]=[{:("Total number of valence"),("electrons in the free"),("atom"):}] -[{:("Total number of non-"),("bonding (lone pair)"),("electrons"):}]-((1)/(2))[{:("Total number of"),("bonding shared"),("electrons"):}] Select correct feature about CO_(3)^(2-) carbonate ion in one of the Lewis structure based on the presence of two single bonds and one double bond between carbon and oxygen atoms.

Total number of lone pairs = 8

Formal charge on two oxygen = `-1` and one oxygen = zero

Oxidation number of `C=+4` and formal charge on C = zero

All are correct

Zero