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Neptunium — Uranium ← Neptunium → Plutonium Pm … Wikipédia en Français
NEPTUNIUM — Élément chimique de numéro atomique 93, le neptunium (symbole Np) est le premier membre de la série d’éléments lourds artificiels: les transuraniens. Comme tous ces éléments, il a de nombreux isotopes qui sont tous radio actifs et produits… … Encyclopédie Universelle
Neptunium — Nep*tu ni*um, n. [NL.] A radioactive metallic element of atomic number 93, produced in nuclear reactors from Plutonium or Uranium. Symbol Np; The atomic weight of the most stable isotope is 237.0482. [PJC] … The Collaborative International Dictionary of English
neptunium — Symbol: Np Atomic number: 93 Atomic weight: (237) Radioactive metallic transuranic element, belongs to the actinoids. Np 237, the most stable isotope, has a half life of 2.2*10^6 years and is a by product of nuclear reactors. The other known… … Elements of periodic system
neptunium — (n.) 1941, from NEPTUNE (Cf. Neptune) + element ending ium. Named for its relative position in the periodic table, next after URANIUM (Cf. Uranium), as the planet Neptune is one beyond Uranus. Cf. also PLUTONIUM (Cf. plutonium) … Etymology dictionary
neptunium — ☆ neptunium [nep to͞o′nē əm, neptyo͞o′nē əm ] n. [ModL < Neptunus, NEPTUNE + IUM: so named by MCMILLAN Edwin MattisonEdwin MattisonEdwin MattisonEdwin MattisonEdwin MattisonEdwin Mattison & P. Abelson (1913 2004), U.S. phys i cists, because… … English World dictionary
Neptunium — uranium ← neptunium → plutonium Pm ↑ Np ↓ (Uqt) … Wikipedia
Neptunium — Eigenschaften … Deutsch Wikipedia
neptunium — /nep tooh nee euhm, tyooh /, n. Chem., Physics. a transuranic element produced in nuclear reactors by the neutron bombardment of U 238: decays rapidly to plutonium and then to U 235. Symbol: Np; at. no.: 93. [1940 45; NEPTUNE + IUM] * * * ▪… … Universalium
Neptunium — Nep|tu|ni|um 〈n.; s; unz.; chem. 〉 künstliches radioaktives Element, Ordnungszahl 93 [neulat., nach dem Planeten Neptun] * * * Nep|tu|ni|um [nach dem Planeten Neptun, der nach dem Uranus (↑ Uran) entdeckt wurde; ↑ ium (1)], das; s; Symbol: Np: in … Universal-Lexikon
