Using Mendeleev's nomenclature for unnamed and undiscovered elements, moscovium is sometimes known as "eka-bismuth". In 1979 IUPAC recommended that the placeholder systematic element name "ununpentium" (with the corresponding symbol of "Uup") be used until the discovery of the element is confirmed and a permanent name is decided. Although widely used in the chemical community on all levels, from chemistry classrooms to advanced textbooks, the recommendations were mostly ignored among scientists in the field, who called it "element 115", with the symbol of "E115", "(115)" or even simply "115".