The oxide ion (O²⁻) is a negatively charged anion with a charge of -2. It is formed when an oxygen atom gains two electrons, resulting in a stable electron configuration with eight valence electrons. Oxide ions are found in various compounds, including oxides and hydroxides, and contribute to the chemical and physical properties of these substances. The charge of oxide ions plays a crucial role in ionic bonding, determining the strength and stability of the resulting compounds.
