electronegativity is the ability of an atom to attract a pair of bonding electrons
if two atoms of the same electronegativity the distribution of electron density will be symmetrical
A polar covalent bond is a type of covalent bond where the bonding electrons are unequally shared, because of this one carries a slight negative charge and the other carries a slight positive charge
A non-polar covalent bond is when the electrons are equally distributed between the two atoms