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.
Meaning of Helmut. German name. In German, the name Helmut means-brave.The name Helmut originated as an German name. The name Helmut is most often used as a boy name or male name.German Name Meaning-brave.Origin-Germany.erman name. In German, the name Helmut means-brave.The name Helmut originated as an German name. The name Helmut is most often used as a boy name or male name. German Name Meaning-brave. Origin-Germany.