Fermium, atomic structure

Fermium, 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: Fermium (Fm). Diagram of the nuclear composition, electron configuration, chemical data, and valence (outer electron) orbitals of an atom of fermium-257 (atomic number: 100), this element's most stable isotope. The nucleus consists of 100 protons (red) and 157 neutrons (orange). 100 electrons (white) successively occupy available electron shells (rings). Fermium, named after Enrico Fermi and first synthesised in 1952, is an actinide and transuranic element in period 7, and the f-block of the periodic table. Actinides are soft radioactive metals. The nucleus of fermium-257 (half-life: 100 days) emits an alpha particle to form californium-253.

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Keywords: 5f, 5f12, 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, fermium, fermium-257, fm, illustration, isotope, level, levels, neutron, neutron number, neutrons, 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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