Question

what is the correct name for the monatomic ion of o^{-2}?
a oxalate
b oxade
c oxygen
d oxide

Explanation:

To determine the correct name for the monatomic ion \( \text{O}^{2-} \):

• Option a: Oxalate is a polyatomic ion (\( \text{C}_2\text{O}_4^{2-} \)), not monatomic. Eliminate a.
• Option b: "Oxade" is not a recognized name for this ion. Eliminate b.
• Option c: Oxygen is the neutral element, not the ion \( \text{O}^{2-} \). Eliminate c.
• Option d: For monatomic anions, we change the ending of the element name to -ide. Oxygen (\( \text{O} \)) forms the \( \text{O}^{2-} \) ion, named oxide.

Answer:

d. Oxide