Polonium - ASCII Periodic Table of the Elements

ASCII PERIODIC TABLE OF THE ELEMENTS

  Po

Relative atomic mass: [209]

English: Polonium
French: Polonium
Croatian: Polonij
German: Polonium
Italian: Polonio
Spanish: Polonio

Atomic number: 84
Group numbers: 16
Period: 6
Standard state (20 °C): solid

Discovery: 1898 Marie Sklodowska Curie, Pierre Curie (FR)

Polonium was discovered by Marie Sklodowska Curie and Pierre Curie (FR) in 1898. Named for 'Poland', native country of Marie Curie. It is a silvery-grey, extremely rare, highly toxic, severe radiotoxic, carcinogen, radioactive metal that is soluble in dilute acids. Polonium occurs in pitchblende. It's produced by bombarding bismuth with neutrons. It is used in industrial equipment that eliminates static electricity caused by such processes as rolling paper, wire and sheet metal.

Electronic configuration: [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁴
Formal oxidation number: +2 +4
Atomic radius: 167.3 pm

Electronegativities: 2
Thermal conductivity: 20 W/(m K)
Electrical resistivity (20 °C): 140 μΩcm

Melting point: 254 °C
Boiling point: 962 °C

Heat of fusion: 10 kJ/mol
Heat of vaporization: 100.8 kJ/mol
Heat of atomization: 141 kJ/mol