Ammonium Ion: A positively charged polyatomic ion with the formula NH4+. It is formed by combining ammonia (NH3) with an acid.
Basicity: The ability of a substance to act as a proton acceptor or donate an electron pair. Ammonia (NH3) is considered a weak base.
Fertilizer Production: Ammonia gas is used in the production of fertilizers such as ammonium nitrate (NH4NO3) to provide essential nutrients for plant growth.