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neptunium

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neptunium /nep·tu·ni·um/ (Np) (nep-toon´e-um) a chemical element, at. no. 93.
nep·tu·ni·um (np-tn-m)
n. Symbol Np
A metallic radioactive element found in trace quantities in uranium ores or synthesized; its longest-lived isotope is Np 237 with a half-life of 2.1 million years. Atomic number 93.
neptunium (Np)
[nept(y)o̅o̅′nē·əm]
Etymology: planet Neptune
a transuranic, metallic element. Its atomic number is 93, and its atomic mass is 237. Although neptunium is considered a synthetic element, traces of natural neptunium have been found in uranium ores.
neptunium (Np) [nep-too´ne-um]
a chemical element, atomic number 93, atomic weight 237. (See Appendix 6.)
neptunium
a chemical element, atomic number 93, atomic weight 237, symbol Np. See Table 6.
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Joni Arends, of Concerned Citizens for Nuclear Safety, said she was concerned about increasing levels of cesium and neptunium in wells making it to Santa Fe's drinking water.
LOS ALAMOS NATIONAL LABORATORY WITH NUDGING, SANTA FEANS EXPRESS ... by The Santa Fe New Mexican (Santa Fe, NM)
Topics include the mechanisms of long-term uranium transport under oxidizing conditions, the structural chemistry of thorium iodates, the structural investigation of neptunium (IV) in toxicological processes, murataite ceramics doped with lanthanides and uranium, and the effects of hydrogen peroxide on the stability of becquerelite.
Actinides 2005--basic science, applications and technology; ... by SciTech Book News
The Integral Fast Reactor's fuel cycle is the first one capable of taking actinides such as neptunium, americium, and plutonium and automatically putting them back--integrating them quickly and automatically--into the nuclear fuel stream.
Converting nuclear waste into energy by USA Today (Magazine)
 
 
 
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