The correct description of the polarity in a water molecule is:
- Partial negative charge on the oxygen atom because it pulls electrons from the hydrogen atoms.
This is because in a water molecule, the oxygen atom is more electronegative than the hydrogen atoms. Electronegativity is the ability of an atom to attract shared electrons in a covalent bond. Oxygen's higher electronegativity compared to hydrogen causes the shared electrons in the O-H bonds to be pulled closer to the oxygen atom, creating a partial negative charge on the oxygen atom and a partial positive charge on the hydrogen atoms. This creates a polar molecule, where one end (oxygen) is partially negative and the other end (hydrogen) is partially positive.
