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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 chemical element; it has symbol Np and atomic number 93. A radioactive actinide metal, neptunium is the first transuranic element. It is named after Neptune, the planet beyond Uranus in the Solar System, which uranium is named after. A neptunium atom has 93 protons and 93 electrons, of which seven are valence electrons.
Photographs and descriptions of many samples of the element Neptunium in the Periodic Table.
Physical and chemical properties of Neptunium: general data, thermal properties, ionization energies, isotopes, reduction potentials, abundance of elements, crystallographic data.
28 Δεκ 2023 · Neptunium, which belongs to the actinide class of the Periodic Table, has an atomic number of 93. It lies between plutonium (94) and uranium (92). It was the first transuranium element to be created intentionally. The radioactive metal neptunium is silvery, ductile, and oxidizes in air.
Neptunium is an actinide and transuranic element in period 7, and the f-block of the periodic table. Actinides are soft radioactive metals. Neptunium-237, produced in the nuclear fuel cycle, is the most stable isotope of neptunium, with a half-life of 2.14 million years.
2 Οκτ 2019 · Get periodic table facts on the chemical and physical properties of the element neptunium.
