The Lewis structure for an ammonium ion indicates a positive charge on the nitrogen atom.

The degree to which ammonia forms the ammonium ion depends on the pH of the solution.

This provides the ammonium ion used in the initial synthesis of carbamoyl phosphate.

Upon formation, several pathways are available to the ammonium ion.

The source of nitrogen can be nitrates, ammonium ions or amino acids.

In an unusual process, ammonium ions form an amalgam.

The ammonium ion has very similar properties to the heavier alkali metals and is often considered a close relative.

The ammonium ions are not involved in the oxidising reactions of this salt.

In most cases, this will yield amino acids and ammonium ions.

Bacterial breakdown of leaf matter is also known to produce ammonium ions.