The NH4 asked about is the amonium ion, and it's written NH4+ to indicate it has a positive charge (+1). It's a cation. Wikipedia has more information on this chemically â¦ significant polyatomic ion, and you'll find that a link to that post is provided below. + 7 others found this useful.
Gilbert is a town in Maricopa County, Arizona, United States, just southeast of Phoenix, within the Phoenix metropolitan area.
Pinal, Arizona. For the ghost town in Pinal County, Arizona, see Pinal City, Arizona. Pinal is a census-designated place (CDP) in Gila County, Arizona, United States. The population was 439 at the 2010 census. The CDP is located in southern Gila County southeast of the center of Globe, the county seat.