Question

what is the formula for the ammonium ion?
nh₄⁺
nh₃
am⁺
amo⁺

Explanation:

The ammonium ion is formed when ammonia (\(NH_3\)) gains a hydrogen ion (\(H^+\)). The formula for ammonia is \(NH_3\), and when it gains an \(H^+\) ion, the formula becomes \(NH_4^+\). \(Am\) is the symbol for Americium (a radioactive element), so \(Am^+\) and \(AmO^+\) are incorrect. \(NH_3\) is the formula for ammonia (a neutral molecule), not the ammonium ion (which is a cation).

Answer:

\(NH_4^+\)