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.
Arnold Settlers in Canada in the 19th Century. 1  George Arnold was a defendant in the Supreme Court in St. John's in 1810. 2  Pat Arnold from County Waterford, Ireland, was married in St. John's in 1811. 3  John Arnold from England and his brother William settled at Greenspond, Newfoundland in 1836, moved later to Traytown. 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.