Chemical element chemical bonds, they form chemical compounds. Only a minority of elements are found uncombined as relatively pure minerals. Among the more common of such native elements are copper, silver, gold, carbon (as coal, graphite, or diamonds), and sulfur. All but a few of the most inert elements, such as noble gases and noble metals, are usually found on Earth in chemically combined form, as chemical compounds. While about 32 of the chemical elements occur on Earth in native uncombined forms, most of these occur as mixtures. For example, atmospheric air is primarily a mixture of nitrogen, oxygen, and argon, and
¡Cu-Cut! ¡Cu-Cut! ¡Cu-cut! was a Catalan illustrated satirical magazine, written in Catalan. Published in Barcelona between 1902 and 1912, it followed the political line marked by Francesc Cambó's Lliga Regionalista. ¡Cu-cut!, named after the cuckoo bird (), was first published on 2 January 1902 and, like El Be Negre magazine that would be published later, it steadfastly opposed Lerrouxism in Spain. Its director was Manuel Folch i Torres and most articles were written by Josep Morató i Grau, Eduard Coca i Vallmajor and Manuel Urgellès, among others such as Josep Abril i Virgili and Vicenç Caldés i Arús. The main illustrators