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Element Neptunium (Np), Group 20, Atomic Number 93, f-block, Mass [237]. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.
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The result of McMillan and Abelson's reaction was the...
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Neptunium is a hard, silvery, ductile, radioactive actinide metal. In the periodic table, it is located to the right of the actinide uranium, to the left of the actinide plutonium and below the lanthanide promethium. [9] Neptunium is a hard metal, having a bulk modulus of 118 GPa, comparable to that of manganese. [10]
2 Οκτ 2019 · Neptunium Basic Facts. Atomic Number: 93. Symbol: Np. Atomic Weight: 237.0482. Discovery: E.M. McMillan and P.H. Abelson 1940 (United States) Electron Configuration: [Rn] 5f 4 6d 1 7s 2. Word Origin: Named after the planet Neptune. Isotopes: 20 isotopes of Neptunium are known.
Neptunium is a chemical element with symbol Np and atomic number 93. Classified as a n actinide, Neptunium is a solid at room temperature.
neptunium (Np), radioactive chemical element of the actinoid series of the periodic table that was the first transuranium element to be artificially produced, atomic number 93. Though traces of neptunium have subsequently been found in nature, where it is not primeval but produced by neutron-induced transmutation reactions in uranium ores ...
Neptunium is the first transuranic element and belongs to actinide series. All transuranic elements are unstable and decay into other elements radioactively. It is represented by the symbol Np and has atomic number 93.
Simple Orthorhombic. History. Neptunium was the first synthetic transuranium element of the actinide series to be discovered. Neptunium was first produced by Edwin McMillan and Philip H. Abelson in 1940 at Berkeley Radiation Laboratory of the University of California.
