"ammonium" - key terms from Wikipedia

ammonium
ammonium	acetate
ammonium	alum
ammonium	bicarbonate
ammonium	carbonate
ammonium	cation
ammonium	chloride
ammonium	hydroxide
ammonium	ion
ammonium	ions
ammonium	nitrate
ammonium	nitrate fertilizer
ammonium	perchlorate
ammonium	salts
ammonium	sulfate
ammonium	sulfide
double ammonium
quaternary ammonium
quaternary ammonium	compounds