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.
With a population of 53,500 residents and covering 4,796 square miles, Gila County has always been a great place to live, work and play. Gila County is in Central Arizona and contains the Tonto Apache Reservation and parts of the Fort Apache and San Carlos Reservations. The county was formed in 1881 from parts of Maricopa and Pinal Counties, and later added the northern portion of the county from Yavapai County.