"Happy'Cam'per" wrote:

Ammonia/Ammonium? = N

Ammonia is NH3

The Ammonium ion is NH4+

Ammonium hydroxide is NH4+ OH-

Nitrogen gas is N2

Ammonia \Am*mo"ni*a\, n. [From sal ammoniac, which was first
obtaining near the temple of Jupiter Ammon, by burning
camel's dung. See {Ammoniac}.] (Chem.)
A gaseous compound of hydrogen and nitrogen, {NH3}, with a
pungent smell and taste: -- often called {volatile alkali},
and {spirits of hartshorn}.

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