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.
Gilbert, Arizona. Gilbert is a town in Maricopa County, Arizona, United States, located southeast of Phoenix, within the Phoenix metropolitan area. Once known as the Hay Shipping Capital of the World,[4] Gilbert is currently the most populous incorporated town in the United States.