Chemical element meaning "no life") for "nitrogen". For purposes of international communication and trade, the official names of the chemical elements both ancient and more recently recognized are decided by the International Union of Pure and Applied Chemistry (IUPAC), which has decided on a sort of international English language, drawing on traditional English names even when an element's chemical symbol is based on a Latin or other traditional word, for example adopting "gold" rather than "aurum" as the name for the 79th element (Au). IUPAC prefers the British spellings "aluminium" and "caesium" over the U.S. spellings "aluminum" and "cesium", and the U.S.
Au pair country. The Council of Europe recommends that au pairs be issued standard contracts with their family. Some au pairs are now male, but females remain the overwhelming majority. Many governments impose limits as to how many hours an au pair is allowed to work. Tasks can include taking children to and from school, taking children to after-school activities, cooking, cleaning, ironing, tidying up and babysitting. Each placement varies depending on the host family. In many developing countries, an abundant supply of local domestic labour is still available, so there is little or no demand for au pairs. Au pair relationships