question: The hydrogen is oxidized because it undergoes a partial loss of what?
distractor3: ions
distractor1: density
distractor2: protons
correct_answer: electrons
support: In the course of this reaction, electrons are shifted away from each hydrogen atom and towards the oxygen atom. The hydrogen is oxidized because it undergoes a partial loss of electrons. Even though the loss is not complete enough to form ions, the hydrogen atoms in water have less electron density near them than they did in the H 2 molecule. The oxygen is reduced because it undergoes a partial gain of electrons. The oxygen atom in water has greater electron density near it than they did in the O 2 molecule.