Neptunium, atomic structure

Neptunium, atomic structure

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This image is part of the sequence science and technology: atomic structure and data for the elements

Credit: CARLOS CLARIVAN/SCIENCE PHOTO LIBRARY

Caption: Neptunium (Np). Diagram of the nuclear composition, electron configuration, chemical data, and valence (outer electron) orbitals of an atom of neptunium-237 (atomic number: 93), an isotope of this element. The nucleus consists of 93 protons (red) and 144 neutrons (orange). 93 electrons (white) successively occupy available electron shells (rings). 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.

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Keywords: 5f, 5f4, 6d, 6d1, 7s, 7s2, actinide, actinides, actinoid, actinoids, amu, atom, atomic, atomic number, atomic orbitals, atomic radius, atomic weight, black background, chemical data, chemical properties, chemical property, chemistry, diagram, electron configuration, electron number, electron shell, electronic, electrons, element, elemental, elements, energy levels, f block, f-block, illustration, isotope, level, levels, neptunium, neptunium-237, neutron, neutron number, neutrons, np, nuclear, nuclear data, nucleon, nucleons, nucleus, orbital, orbital types, orbitals, period 7, physical chemistry, physical properties, physical property, pm, proton number, quantum chemistry, radioactive, radioisotope, radioisotopes, shell, shell structure, shells, simple electron configuration, solid, solids, structural, structure, sub-atomic, subatomic, subshell, subshells, symbol, trans-uranic, trans-uranics, transuranic, transuranics, transuranium, valence orbital, wave function

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