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Polonium, atomic structure

Polonium, atomic structure

C013/1641

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60.0 MB (1.0 MB compressed)

4579 x 4579 pixels

38.9 x 38.9 cm ⏐ 15.3 x 15.3 in (300dpi)

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Credit

SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY

Caption

Polonium (Po). Diagram of the nuclear composition and electron configuration of an atom of polonium-210 (atomic number: 84), a natural isotope of this element. The nucleus consists of 84 protons (red) and 126 neutrons (blue). 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-210, which forms in uranium ores, has a half-life of 138 days, emitting an alpha particle from its unstable nucleus to form lead-206.

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