Polar and Non-polar Covalent bonds

[Rogelio Bazan 1D]

I know this is an old one but what is the difference between polar and non-polar covalent bonds?

[Andrew Evans - 1G]

A polar covalent bond has a an unequal distribution of charge, meaning one of the bonded atoms has a higher electronegativity than the other.

So the guideline is that if the electronegativity difference > 2 the bond is ionic.
If the difference is <1.5 the bond is covalent.
And that in between area from 1.5-2 is where a polar covalent bond would lie.

[Maxwell S 3E]

Elements have their own electronegative values, so the difference between the elements in the bond then signifies such polarity, or lack thereof it. Understanding the base polarity difference of most common elements in bonding can also help you understand the polarity of more than just covalent bonds, but also seeing how the polarity is represented in all bonds.

[daisyjimenezt]

A polar bond is a bond between two atoms with different electronegativity
a non-polar bond is between two atoms with similar electronegativity

[Anna O 2C]

Also, the negativity will be concentrated on one side of the molecule/bond where one atom has a high electronegativity than the other. When this happens, even though both atoms are sharing the electron and thus attached to each other, the electron is more likely to be found closer to the atom with higher electronegativity that wants an atom rather than the other atom that is looking more to get rid of said electron.