Element not or no longer occurring on earth, but artificially generated by nuclear reaction. The artificial elements include the elements technetium (atomic number 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 plutonium occur in nature resulting from natural nuclear fissions (about 1 pluto-nium atom per 1012 uranium atoms).

Element name

Symbol

Atomic number

Technetium

Tc

43

Promethium

Pm

61

Neptunium

Np

93

Plutonium

Pu

94

Americium

Am

95

Curium

Cm

96

Berkelium

Bk

97

Californium

Cf

98

Einsteinium

Es

99

Fermium

Fm

100

Mendelevium

Md

101

Nobelium

No

102

Lawrencium

Lw

103

Rutherfordium

Rf

104

Dubnium

Db

105

Seaborgium

Sb

106

Bohrium

Bh

107

Hassium

Hs

108

Meitnerium

Mt

109

Darmstadtium

Ds

110

Roentgenium

Rg

111

Copernicium

Cn

112

Still without name

113

Flerovium

Fl

114

Still without name

115

Livermorium

Lv

116

Still without name

117

Still without name

118

List of artificial elements