 |
| Polar Covalent bond and Non-Polar Covalent Bond |
Polar Covalent bond and Non-Polar Covalent Bond
Non-Polar Covalent bond
The covalent bond which is formed between atoms having same electronegativities
is called non-polar covalent.
Exp:
Non-polar
covalent bond is usually formed between similar atoms in which shared pair of
electrons is attracted equally by bonded atoms. I-e Electronegativities of
bonded atoms of non-polar atoms are same. The molecules having non-polar
covalent bonds are called non-polar molecules.
Examples:
N2,H2,O2
etc.
Polar Covalent bond
The covalent bond which is formed between atoms having different
electronegativities is called polar
covalent.
Exp:
Polar
covalent bond is usually formed between different atoms in which shared pair of
electrons is not attracted equally by bonded atoms. The atoms
having higher electronegativities will attract the bonded pair of electrons
more strongly toward itself than other. This will result in the formation poles
on atoms of the molecules. I-0e partial positive charged atom will be formed on
less electronegative atom and partial negative atom will be formed on more
electronegative atom. I-e Electronegativities of bonded atoms of polar atoms
are different. The molecules having polar covalent bonds are called polar
molecules.
Examples:
Hydrochloric
acid as explain below
The electronegativity of
hydrogen atom is 2.2 and electronegativity of chlorine atom is 3.2 so the
difference of electronegativity between these two atoms is 1.0
