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.
Location of Gilbert on a map. Gilbert is a city found in Arizona, The United States Of America. It is located 33.35 latitude and -111.79 longitude and it is situated at elevation 377 meters above sea level. Gilbert has a population of 208,453 making it the 7th biggest city in Arizona.