Element, artificial

ElementChemical base material which cannot be chemically converted ... not or no longer occurring on earth, but artificially generated by nuclear reaction. The artificial elements include the elements technetium (atomic numberNumber of protons in an atomic nucleus. Each chemical elemen... Z = 43), promethium (Z = 61) and the tran-suraniums (Z > 92). A total of 118 elements are therefore known today. In the 70’s, it could be verified that very low traces of plutoniumPlutonium - the 94th element in the classification of elemen... occur in nature resulting from natural nuclear fissions (about 1 pluto-nium atomSmallest particle of an element which cannot be chemically d... per 1012 uraniumNatural radioactive element with the atomic number 92. The n... atoms).

List of artificial elements