Neptunium
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Neptunium (symbol: Np) is a chemical element, a member of the actinoid series. All isotopes of neptunium are unstable, with half-lives of less than about two million years.[1]
Neptunium was first prepared in 1939 by Edwin McMillan at the University of California Radiation Laboratory, by the neutron bombardment of uranium-238. It was named after the planet Neptune, by analogy with uranium, named after the planet Uranus.
Notes and references
Notes
References
- ↑ Audi, G.; Bersillon, O.; Blachot, J.; Wapstra, A. H. The NUBASE evaluation of nuclear and decay properties. Nucl. Phys. A 2003, 729, 3–128. doi:10.1016/j.nuclphysa.2003.11.001, <http://amdc.in2p3.fr/nubase/Nubase2003.pdf>.
External links
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See also the corresponding article on Wikipedia. |
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