Radium, atomic structure

Radium, 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: Radium (Ra). Diagram of the nuclear composition, electron configuration, chemical data, and valence (outer electron) orbitals of an atom of radium-226 (atomic number: 88), the most stable isotope of this element. The nucleus consists of 88 protons (red) and 138 neutrons (orange). 88 electrons (white) successively occupy available electron shells (rings). Radium is a radioactive alkaline earth metal in group 2, period 7, and the s-block of the periodic table. Formed in uranium ores, the Curies discovered it in 1898. Radium-226, once used in watches, has a half-life of 1061 years, with the unstable nucleus emitting an alpha particle to form radon-222.

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Keywords: 7s, 7s2, alkaline earth metal, alkaline earth metals, 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, illustration, isotope, level, levels, metal, metallic, metals, neutron, neutron number, neutrons, nuclear, nuclear data, nucleon, nucleons, nucleus, orbital, orbital types, orbitals, p block, p-block, period 7, physical chemistry, physical properties, physical property, pm, proton number, quantum chemistry, ra, radioactive, radioisotope, radioisotopes, radium, radium-226, shell, shell structure, shells, simple electron configuration, solid, solids, structural, structure, sub-atomic, subatomic, subshell, subshells, symbol, valence orbital, wave function

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