Because the electrons have a slight negative charge, there is a slight negative charge near the atom; there is a slight charge near the hydrogen atom.

Oxygen and positive charge.

Explanation:

The value of electronegativities of oxygen is higher than hydrogen due to which a slight negative charge occur on its oxygen atom and a slight positive charge on its hydrogen atoms of water molecule. The water is polar in nature because oxygen attract the shared pair of electron that leads to partial negative charge on oxygen while on the other hand, the hydrogen atom has acquire partial positive charge.