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.
A name of uncertain etymology which has been in common use in Scotland since the 12th century. Some believe it to be an old Norman name derived from the element arn (eagle) or arin (a hearth). Others think it is a variant of Amabel, an old French name derived from the Latin amÄbilis (lovable) or from the Gaelic Aine (ainÃ¨). joy