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.
This interesting name has three possible origins, the first being derived from an Anglo-Saxon occupational name for a grower or seller of beans, from the Old English pre 7th Century 'bean', beans.he first recording in Scotland is of one Ferchard Bean (1428, Edinburgh). The first recorded spelling of the family name is shown to be that of Ailwardus Bene, which was dated 1166, The Norfolk County Pipe Rolls, during the reign of King Henry 11, 'The Builder of Churches', 1154-1189.