 |
|
| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
|
|
transuranic element
Any element lying beyond uranium in the periodic table, i.e. any element of atomic number greater than 92. Except for the plutonium isotopes Pu-244 (half-life about 80 million years) and Pu-239 (continuous reformation in rock containing uranium by neutron capture in U-238 by neutrons from the spontaneous fission of U-238) detected in very small quantities, all transuranic elements must be produced artificially by suitable nuclear reactions. All are radioactive.
| Table of transuranic elements | ||
|---|---|---|
| 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 |
| not yet named | - | 112 |
| not yet named | - | 114 |
| not yet named | - | 115 |
Related categories
• ATOMIC AND NUCLEAR PHYSICS
• INORGANIC CHEMISTRY
Also on this site:
Encyclopedia of Alternative Energy & Sustainable Living
Encyclopedia of History
Transport Concepts & Designs (partner site)