• Neptunium is a chemical element; it has symbol Np and atomic number 93. A radioactive actinide metal, neptunium is the first transuranic element. It is...
    113 KB (13,707 words) - 19:00, 28 October 2024
  • Neptunium (93Np) is usually considered an artificial element, although trace quantities are found in nature, so a standard atomic weight cannot be given...
    26 KB (2,461 words) - 05:01, 19 October 2024
  • Thumbnail for Neptunium tetrabromide
    Neptunium tetrabromide is a binary inorganic compound of neptunium metal and bromine with the chemical formula NpBr4. The compound can be prepared from...
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  • Thumbnail for Decay chain
    Decay chain (redirect from Neptunium Series)
    neutrinos, is 42.6 MeV. The 4n + 1 chain of neptunium-237 is commonly called the "neptunium series" or "neptunium cascade". In this series, only two of the...
    46 KB (3,963 words) - 09:53, 23 October 2024
  • but the valence +4 is preferred in solid neptunium compounds. Neptunium metal is very reactive. Ions of neptunium are prone to hydrolysis and formation of...
    130 KB (11,599 words) - 02:19, 29 October 2024
  • Neptunium nitride is a binary inorganic compound of neptunium and nitrogen with the chemical formula NpN. Neptunium nitride can be prepared by the reaction...
    4 KB (282 words) - 14:35, 6 February 2024
  • Neptunium compounds are compounds containing the element neptunium (Np). Neptunium has five ionic oxidation states ranging from +3 to +7 when forming chemical...
    48 KB (5,596 words) - 08:07, 27 September 2024
  • Neptunium fluoride may refer to: Neptunium(III) fluoride, NpF3 Neptunium(IV) fluoride, NpF4 Neptunium(V) fluoride, NpF5 Neptunium(VI) fluoride, NpF6 This...
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  • Neptunium monocarbide is a binary compound of neptunium metal and carbon with the chemical formula NpC. Heating of freshly obtained neptunium hydride...
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  • Thumbnail for Neptunium tetrachloride
    Neptunium tetrachloride is a binary inorganic compound of neptunium metal and chlorine with the chemical formula NpCl4. The compound can be prepared by:...
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  • Thumbnail for Actinides in the environment
    of actinium, protactinium, neptunium, and plutonium exist as a result of radioactive decay and (in the case of neptunium and plutonium) neutron capture...
    20 KB (2,305 words) - 07:17, 12 November 2024
  • are radioactively unstable and decay into other elements. Except for neptunium and plutonium which have been found in trace amounts in nature, none occur...
    17 KB (2,031 words) - 23:06, 9 October 2024
  • Thumbnail for Plutonium-238
    bombarding uranium-238 with deuterons, creating neptunium-238. 238 92U + 2 1H → 238 93Np + 2 n The neptunium isotope then undergoes β− decay to plutonium-238...
    38 KB (3,993 words) - 22:01, 21 October 2024
  • Neptunium(III) phosphide is a binary inorganic compound of neptunium metal and phosphorus with the chemical formula NpP. Neptunium(III) phosphide can be...
    3 KB (199 words) - 14:50, 25 June 2024
  • Thumbnail for Plutonium
    5-metre (60 in) cyclotron at the University of California, Berkeley. First, neptunium-238 (half-life 2.1 days) was synthesized, which then beta-decayed to form...
    139 KB (14,981 words) - 08:15, 9 November 2024
  • Seine-Saint-Denis, French department, Paris, Île-de-France Atomic number 93: neptunium Ninety-Three, English title of Quatrevingt-treize (same meaning), a novel...
    713 bytes (132 words) - 03:48, 14 May 2024
  • Neptunium(IV) phosphide is a binary inorganic compound of neptunium metal and phosphorus with the chemical formula Np3P4. Neptunium(IV) phosphide can...
    3 KB (220 words) - 11:32, 20 March 2024
  • Thumbnail for Neptunium(IV) oxide
    Neptunium(IV) oxide, or neptunium dioxide, is a radioactive, olive green cubic crystalline solid with the formula NpO2. It emits both α- and γ-particles...
    10 KB (799 words) - 13:07, 1 August 2024
  • Thumbnail for Neptunium(III) iodide
    Neptunium(III) iodide is the iodide of neptunium with the chemical formula NpI3. Neptunium(III) iodide can be produced by the reaction of neptunium dioxide...
    3 KB (258 words) - 11:38, 5 January 2024
  • Thumbnail for Edwin McMillan
    physicist credited with being the first to produce a transuranium element, neptunium. For this, he shared the 1951 Nobel Prize in Chemistry with Glenn Seaborg...
    30 KB (3,419 words) - 10:06, 7 September 2024
  • Neptunium(III) bromide is a bromide of neptunium, with the chemical formula of NpBr3. Neptunium(III) bromide can be prepared by reacting neptunium dioxide...
    4 KB (306 words) - 11:39, 5 January 2024
  • Thumbnail for Neptunium(VI) fluoride
    Neptunium(VI) fluoride (NpF6) is the highest fluoride of neptunium, it is also one of seventeen known binary hexafluorides. It is a volatile orange crystalline...
    13 KB (1,316 words) - 16:58, 10 June 2024
  • Nucleoside phosphorylase, an enzyme Nurse practitioner Kallikrein 8, an enzyme Neptunium, symbol Np, a chemical element Nosocomial pneumonia Natriuretic peptide...
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  • Thumbnail for Cubic crystal system
    antimonide Uranium bismuthide Neptunium Neptunium nitride Neptunium phosphide Neptunium arsenide Neptunium antimonide Neptunium bismuthide Plutonium Plutonium...
    49 KB (3,620 words) - 14:56, 4 October 2024
  • 43; promethium, number 61; astatine, number 85; francium, number 87; neptunium, number 93; and plutonium, number 94. These 94 elements have been detected...
    76 KB (10,055 words) - 09:18, 14 November 2024
  • Thumbnail for Periodic table
    technetium (element 43), promethium (element 61), astatine (element 85), neptunium (element 93), and plutonium (element 94). No element heavier than einsteinium...
    250 KB (26,986 words) - 04:50, 11 November 2024
  • Thumbnail for Gold
    Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium...
    142 KB (16,014 words) - 01:41, 11 November 2024
  • Thumbnail for Manganese
    Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium...
    86 KB (9,745 words) - 07:25, 17 November 2024
  • Thumbnail for Nuclear weapon
    uranium-235 and plutonium-239. Less commonly used has been uranium-233. Neptunium-237 and some isotopes of americium may be usable for nuclear explosives...
    116 KB (13,252 words) - 00:49, 10 November 2024
  • Thumbnail for Uranium
    when 238U captures a neutron but emits two more, which then decays to neptunium-237; uranium-236, which occurs in trace quantities due to neutron capture...
    110 KB (12,380 words) - 11:06, 17 October 2024