Ammonium: nm The ammonium ion with the chemical formula NH4+ is a polyatomic ion with a positive electrical charge. This polyatomic cation (*) has a tetrahedral structure, with the nitrogen atom N occupying the center and the four hydrogen atoms occupying the equivalent vertices of the tetrahedron. It is obtained by protonation of ammonia (NH3); it is sometimes presented as an ionized ammonia molecule.
The ammonium ion is present in many cleaning and disinfecting products, starting with...
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