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
Au pair pay fees which vary depending on the US agency and the home country agency they use (if they do not apply directly to the US agency). Au Pair online profile An online profile is one of the most important steps for any au pair searching for a family. Families using the profile to get to know the au pair before scheduling an interview. It is therefore crucial that au pairs have a professional profile that is accessible at all times with a fully working contact form. Au pairs need to be aware that having private information publicly available could be