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.
One of the first settlers in Virginia was Thomas Arnold, aged 30 yrs., who embarked from London on the ship Plaine Joan, in May 1635. The first recorded spelling of the family name anywhere is believed to be that of Puntius Arnaldi, which was dated 1196, in the rolls of Devonshire, England.n the year 1086 the Normans completed a survey of the country known as the Domesday Book, this being the first gazetter of its kind ever produced. Rogerus filius Ernaldi is recorded in Domesday Book for London, this being the first known recording of the name, although not as a surname.