Samarium, atomic structure

Samarium, atomic structure

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This image is part of the sequence science and technology: simple electron configurations of the elements

Credit: SCIENCE PHOTO LIBRARY

Caption: Samarium (Sm). Diagram of the nuclear composition and electron configuration of an atom of samarium-152 (atomic number: 62), the most common isotope of this element. The nucleus consists of 62 protons (red) and 90 neutrons (blue). 62 electrons (green) bind to the nucleus, successively occupying available electron shells (rings). Samarium is a lanthanide in period 6, and the f-block of the periodic table. It melts at 1072 degrees Celsius. The trend across the lanthanide series arises from the failure of electrons filling an inner f-subshell (here, within the 4th ring) to shield outer electrons from increasing nuclear charge.

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Keywords: atom, atomic, chemical properties, chemical property, chemistry, diagram, electron configuration, electron shell, electronic, electrons, element, elemental, elements, f block, f-block, illustration, isotope, lanthanide, lanthanides, lanthanoid, lanthanoids, level, levels, neutron, neutrons, nuclear, nucleon, nucleons, nucleus, orbital, orbitals, period 6, physical chemistry, physical properties, physical property, rare earth, rare earths, samarium, samarium-152, shell, shells, simple electron configuration, sm, solid, solids, structural, structure, sub-atomic, subatomic, subshell, subshells, white background

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