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Po

Polonium

84209
General Information
  • Melting Point: 527 K (254°C)
  • Boiling Point: 1235 K (962°C)
  • Type of Substance: Post-Transition Metal
  • Discovered By: Marie Curie
  • Year of Discovery: 1898
Electrons and Ionisation
  • Electron Configuration: [Xe] 4f14 5d10 6s2 6p4
  • Electrons Per Shell: 2, 8, 18, 32, 18, 6
  • Oxidation States: 6, 5, 4, 2, −2
  • Electronegativity: 2
History

Polonium was the first element discovered by Marie Sklodowska Curie in 1898, while seeking the cause of radioactivity of pitchblende from Joachimsthal, Bohemia. It required several tonnes of pitchblende to produce very small amounts of polonium.

Engineering
  • Resistivity: 0.4  µΩ·m
  • Thermal Expansion: 23.5×10-6 K-1
  • Thermal Conductivity: 20 W/m·K