neptunium


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neptunium

 (Np) [nep-too´ne-um]
a chemical element, atomic number 93, atomic weight 237. (See Appendix 6.)

nep·tu·ni·um (Np),

(nep-tū'nē-ŭm),
A radioactive element; atomic no. 93; first element of the transuranian series (not found in nature); 237Np has a half-life of 2.14 × 106 years.
[planet, Neptune]

neptunium

/nep·tu·ni·um/ (Np) (nep-toon´e-um) a chemical element, at. no. 93.

neptunium (Np)

[nept(y)o̅o̅′nē·əm]
Etymology: planet Neptune
a transuranic, metallic element. Its atomic number is 93; its atomic mass is 237. Although neptunium is considered a synthetic element, traces of natural neptunium have been found in uranium ores.

nep·tu·ni·um

(nep-tū'nē-ŭm)
A radioactive element; atomic no. 93; first element of the transuranian series (not found in nature); 237Np has a half-life of 2.14 × 106 years.
[planet, Neptune]

neptunium

a chemical element, atomic number 93, atomic weight 237, symbol Np. See Table 6.
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References in periodicals archive ?
Commercial nuclear reactors create annually tons of neptunium mixed in with other nuclear waste.
nuclear-weapons program has generated about 340 kg of pure neptunium, says Rene G.
Water passing over the inch-long, half-inch-diameter glassy cylinder -- containing the radionuclides neptunium, americium and plutonium-- collected in the enclosing vessel.
However, his group found that only neptunium dissolved.