Question

common polyatomic ions
use your polyatomic ion list to complete
the table below.
what is the formula for the nitrite ion?

Explanation:

The nitrite ion is a polyatomic ion. The suffix -ite indicates one less oxygen atom than the -ate form. The nitrate ion is \(NO_{3}^{-}\), so the nitrite ion has one less oxygen atom, resulting in \(NO_{2}^{-}\).

Answer:

\(NO_{2}^{-}\) (corresponding to the middle option \(NO_{2}^{-}\) among the given choices)