Question

a covalent bond occurs when multiple choice electrons are transferred from one atom to another. the hydrogen of one water molecule is attracted to the oxygen of another water molecule. electrons are shared between two atoms to complete their valence shells. protons are transferred from one atom to another. neutrons are shared between two atoms to form an isotope.

Explanation:

• Option A: Electron transfer is for ionic bonds, not covalent.
• Option B: Describes hydrogen bonding (intermolecular), not covalent (intramolecular bond formation).
• Option C: Covalent bonds involve sharing electrons to fill valence shells (e.g., in $H_2$, $O_2$).
• Option D: Protons do not transfer in bond formation (they define the element).
• Option E: Neutrons are not involved in bond formation (isotopes relate to neutron number, not bonding).

Answer:

C. electrons are shared between two atoms to complete their valence shells.