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.
Suggested Readings for the name Arnold. 1  Ancestry and Descendants of John Chambers Arnold and Mary Elizabeth (Shepherd) Arnold: 1789-1967 by Marjorie Organ Regan.2  The Arnold Best, Cullison and Herron Families by Evelyn L. Strong. William and Thomas Arnold of Nottingham, England, who settled in Higham Mass, and Watertown New York in May 1635. 2  William later moved to Providence, Rhode Island.