Confidence votes 261K. NH4 in chemistry is the formula for ammonium. It consists of one nitrogen atom to 4 hydrogen atoms. It is formed when a chemical process converts ammonia with the chemical formula NH3 to ammonium.
GILBERT MEDICAL GROUP LLC. GILBERT MEDICAL GROUP LLC is a Chiropractic Rehabilitation Specialist facility at 754 S VAL VISTA DR STE105 in GILBERT, AZ. Chiropractic Rehabilitation Specialist. Services GILBERT MEDICAL GROUP LLC is a Chiropractic Rehabilitation Specialist/office located in GILBERT, AZ 85296. A Chiropractic Rehabilitation Specialist is fully trained in chiropractic care but also has had extensive training in rehabilitation and physiologic therapeutics in order to better treat injuries.
1910s. 1  Sir W. S. Gilbert (b. 1836), British humorist, librettist of the Gilbert and Sullivan operas, drowned on 29 May 1911 while going to the rescue of two other swimmers in the lake at his home. He may have died from a heart attack rather than by drowning.