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 Weather & Climate. The weather in Gilbert is similar to that of Phoenix. It is hot during the summer months of June, July and August when everyone heads to the area lakes for boating recreation. The rest of the year has ideal temperatures perfect for golf and hiking the local trails and outdoor recreation.