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.
The name derives from the Old French, Middle English mote, a moat, ditch or fortified stronghold, and was originally given as a topographical name to one who resided by such a fortification, or as a locational name to someone from any of the places in France named with this word.he first recorded spelling of the family name is shown to be that of William Moth, which was dated 1273, in the Hundred Rolls of Norfolk, during the reign of King Edward 1, known as The Hammer of the Scots, 1272 - 1307. Surnames became necessary when governments introduced personal taxation.