Ammonium cation: The cation of molecular formula NH 4 + (i.e., the conjugate acid of ammonia). Can also refer to any cation in which nitrogen has four single bonds and a positive formal charge, such as the tetra methyl ammonium cation.
Arden /ar-den/ [2 sylls.] as a girls' name (also used as boys' name Arden) is pronounced AR-den. It is of Latin origin, and the meaning of Arden is great forest. Literary: the Forest of Arden in Shakespeare's As You Like It was a magically beautiful place.
Primarily in Belgium and Luxembourg, but stretching into Germany and France (lending its name to the Ardennes department and the former Champagne-Ardenne region), and geologically into the Eifelâthe eastern extension of the Ardennes Forest into Bitburg-PrÃ¼m, Germany, most of the Ardennes proper consists of southeastern Wallonia, the southern and more rural part of the Kingdom of Belgium (away from the coastal plain but encompassing over half of the kingdom's total area).