The main reason why the oxygen in a water molecule has a slightly negative charge and the hydrogens have a slight positive charge is that electrons spend less time around hydrogen than around oxygen.
The water molecule is a chemical compound made up of two hydrogen molecules and one oxygen molecule (H2O). In chemical compounds, the molecules of the elements share electrons that orbit around their nuclei.
In the case of the water molecule, the electrons shared between oxygen and hydrogen orbit more around the oxygen molecule than in hydrogen molecules.
Therefore, the correct answer is D. because it expresses the situation that causes the oxygen molecule (of a water molecule) to have a slight positive charge and the hydrogen to have a slight negative charge.
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