85* Polonium

Element of the day (day 85)
#84) Po-Polonium-] radioactive--
not found naturally or occurs in such minute amounts that it does not reasonably exist on Earth.
Discovered in 1898 by Marie Curie, France.
A radioactive silvery-gray metal. The metal will actually evaporate over time. Used as a heat and thermoelectric power source aboard satellites. The most stable isotope of polonium has a half-life of 102 years.

Polonium is a decay product of uranium; found in minute amounts in uranium ore. Produced in the laboratory.