Covalent Bond
Covalent Bonds are the bonds which are formed by sharing of electrons.
·
When sharing of one pair of electron
takes place is known as single covalent bond.
·
When sharing of two pair of electrons
takes place is known as double bond.
·
When sharing of three pair of electron
takes place is known as triple bond.
Formal Charge (F.C.)
For polyatomic molecule or ion, formal charge of an
atom in a Lewis structure = [Total no. of Valence electron in free Atom] -
[total no. of non bonding (lone- pair) elements]- 1/2[total no of bonding
(shared) electrons]
Ex :- Lewis structure of O3 (ozone
molecule)
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