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.
Prescott, Arizona. Prescott (/ËprÉskÉt/ PRES-kÉt; Yavapai: Ê¼Wi:kwatha KsikÊ¼ita) is a city in Yavapai County, Arizona, United States. According to the 2010 Census, the population of the city is 39,843. The city is the county seat of Yavapai County.