Tags: Chemical Compound, Chemical Substance.

The ammonium cation is a positively charged polyatomic ion with the chemical formula NH4+. It is formed by the protonation of ammonia (NH3). Ammonium is also a general name for positively charged or protonated substituted amines and quaternary ammonium cations (NR4+) where one or more hydrogen atoms are replaced by organic radical groups (indicated by R).

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