Question

ionic bonds are formed by:
a electron transfer
b proton sharing
c hydrogen bonding to oxygen
d electron sharing

Explanation:

Ionic bonds are formed when one atom transfers electrons to another atom. This electron transfer results in the formation of positively and negatively charged ions, which are then attracted to each other.

• Option A: Electron transfer is the correct mechanism for ionic bond formation.
• Option B: Proton sharing is not a relevant concept in bond formation. Protons are in the nucleus and not involved in bonding in this way.
• Option C: Hydrogen bonding to oxygen is a type of intermolecular force, not a bond formation mechanism for ionic bonds.
• Option D: Electron sharing is the mechanism for covalent bond formation, not ionic bonds.

Answer:

A. electron transfer