Chemical element of metals. Cu comes from Cuprum, Fe comes from Ferrum, Ag from Argentum. The symbols were not followed by a period (full stop) as with abbreviations. Later chemical elements were also assigned unique chemical symbols, based on the name of the element, but not necessarily in English. For example, sodium has the chemical symbol 'Na' after the Latin "natrium". The same applies to "W" (wolfram) for tungsten, "Fe" (ferrum) for iron, "Hg" (hydrargyrum) for mercury, "Sn" (stannum) for tin, "K" (kalium) for potassium, "Au" (aurum) for gold, "Ag" (argentum) for silver, "Pb" (plumbum) for lead, "Cu" (cuprum) for copper, and
Carl Au of "Bright Phoenix". He was cast in 2017 as Bobby in Jeff Pope's production "Cilla The Musical", an adaptation of the ITV television series. Au currently splits his time between Liverpool and London. Au is highly skilled in ballad, ballet, baritone, choreography, contemporary dance, jazz dancing and jazz singing. Carl Au Carl Andrew Au (born April 1987) is a British actor, known for his role as Barry Barry in BBC school drama, "Waterloo Road" and his many stage credits. Au began his stage career in 1998, whilst very young. He played Tootles and Nibs in a production of "Peter Pan".