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Transuranium element

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Chemical element in the classification of elements, the atomic number of which is greater than 92, that of uranium. Except for the plutonium isotopes Pu 244 (half-life about 80 million years) and Pu 239 (continuous reformation in uranium by neutron capture in U 238 by neutrons from the spontaneous fission of U 238) detected in very small quantities, all transuranium elements must be produced artifi-cially.

Element name

Symbol

Atomic no.

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

Transuranium elements

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