Polonium (Po). Diagram of the nuclear composition, electron configuration, chemical data, and valence (outer electron) orbitals of an atom of polonium
Polonium (Po). Diagram of the nuclear composition, electron configuration, chemical data, and valence (outer electron) orbitals of an atom of polonium-209 (atomic number: 84), an isotope of this element. The nucleus consists of 84 protons (red) and 125 neutrons (orange). 84 electrons (white) successively occupy available electron shells (rings). Polonium is a radioactive metalloid in group 16, period 6, and the p-block of the periodic table. Discovered in 1898 by the Curies, it was named after Poland. Polonium-209 has a half-life of 103 years.
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Photo credit: © CARLOS CLARIVAN/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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