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, AZ Weather. The average temperature of Gilbert is 71.15Â°F, which is much higher than the Arizona average temperature of 65.97Â°F and is much higher than the national average temperature of 54.45Â°F. Historical Weather.