Question

question 4 (1 point) listen why is one side of a single water molecule partially negative while the other side is partially positive? a) electron pairs are unevenly shared between the two hydrogen atoms. b) oxygen donates its electrons to hydrogen. c) hydrogen donates its electrons to oxygen. d) electron pairs are unevenly shared between the oxygen atom and the two hydrogen atoms.

Explanation:

To determine the correct answer, we analyze each option:

• Option A: Electron pairs are shared between O and H, not between the two H atoms. Eliminate A.
• Option B: In a water molecule, electrons are shared (covalent bond), not donated. Oxygen does not donate electrons to hydrogen. Eliminate B.
• Option C: Similarly, hydrogen does not donate electrons to oxygen; it's a covalent bond with unequal sharing. Eliminate C.
• Option D: Oxygen is more electronegative than hydrogen, so electron pairs in the O - H bonds are unevenly shared, making O - side partially negative and H - side partially positive. This matches the polarity of a water molecule.

Answer:

D. Electron pairs are unevenly shared between the oxygen atom and the two hydrogen atoms.