Polar Bonds

Question 1

what is a non polar covalent bond

Answer 1

When two atoms in a covalent bond have the same electronegativity the covalent bond is nonpolar

e.g two chlorine atoms have the same electronegativities so the bonding electrons are shared equally between the two atoms

Question 2

What is a polar bond

Answer 2

When two atoms in a covalent bond have different electronegativities the covalent bond is polar and the electrons will be drawn towards the more electronegative atom

Question 3

As a result of a polar bond what happens

Answer 3

The negative charge centre and positive charge centre do not coincide with each other

This means that the electron distribution is asymmetric

The less electronegative atom gets a partial charge of δ+ (delta positive)

The more electronegative atom gets a partial charge of δ- (delta negative)

Question 4

The greater the difference in electronegativity the more

Answer 4

polar the bond becomes

Cl has a greater electronegativity than H causing the electrons to be more attracted towards the Cl atom which becomes delta negative and the H delta positive