What is the difference between a polar covalent bond and a non polar covalent bond?
A polar covalent bond is a molecule where one side is positively charged due to the other atom taking a bit more of the electron from it. The other side is negatively charged because it has a bit more of an electron which is negatively charged. An example of this would be a water molecule, the oxygen atom has more protons than the hydrogen atoms and so the oxygen atom pulls more upon those shared electrons making it positive and the hydrogen atoms negative.
