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 surname is of Anglo-Saxon origin, and is lcoational from a place so called in Kent, which was originally the name of a river. The first element seems to be derived from the Old English pre 7th Century rum, spacious, but its formation and meaning are obscure.he first recorded spelling of the family name is shown to be that of Robert de Romenel, which was dated 1086, The Domesday Book of Kent, during the reign of King William 1, The Conqueror, 1066 - 1087.