The ammonium ion has a formula of NH4+ and has a positive charge so it is a cation.
Arnold /ar-nold/ [2 sylls.] as a boys' name is pronounced AR-nold. It is of Old French and Old German origin, and the meaning of Arnold is eagle ruler.From the phrase arn wald. Brought to Britain with the Norman invasion, lost popularity after the 13th century, and briefly revived in the late 19th century.rnold /ar-nold/ [2 sylls.] as a boys' name is pronounced AR-nold. It is of Old French and Old German origin, and the meaning of Arnold is eagle ruler.
Notes: Oliver is a name with English origins. Contrary to popular belief, the meaning of Oliver is Elf Army. The name has nothing to do with olives or olive trees. It originates from the Germanic name Alfher composed of the elements alf (elf) and hari (army/warrior).The most common nickname for Oliver is Ollie.ontrary to popular belief, the meaning of Oliver is Elf Army. The name has nothing to do with olives or olive trees. It originates from the Germanic name Alfher composed of the elements alf (elf) and hari (army/warrior). The most common nickname for Oliver is Ollie.