By De Martin
Polonium's atomic mass is 209 and its atomic radius is 190 pm (picometers). Polonium has a density of 9.196 g/cc. Its melting point is 254 C (489 F) and its boiling point is 962 C (1764 F).
At room temperature, this element is a solid.
Polonium has a silvery appearance.
Polonium's electrical conductivity decreases as the temperature increases. Both its malleability and hardness is unknown, but if I were to guess, I'd say that polonium has a high hardness.
Polonium is sometimes considered a metalloid.
Discovered polonium, having no idea it was extremely radioactive.
So radioactive, it must be kept in a lead-lined case.
Polonium is named after Curie's birthplace, Poland.
Marie Curie was born on November 7th, 1867 in Poland.
Marie and Pierre Curie discovered polonium in 1898 in Paris, France. Curie was experimenting with uranium when she discovered this new and extremely radioactive element.
This was the first element ever discovered by Marie Curie. She died on July 4th, 1934 from radioactive poisoning.
Uses of Polonium
Polonium is used in sheet metal factories to eliminate static electricity.
Polonium is used for atomic heat.
Polonium is in anti-static brushes for photographic film.
Compounds and Isotopes
Almost all 50 compounds in polonium are synthetically created. The most stable are polonides (picture shown). They are created by a direct reaction between two elements.
There are no stable or "naturally occurring" isotopes in polonium, but there are 33 known radioactive isotopes. For a list of known isotopes, check out this link:
Atomic Number: 209
Mass Number: 84
Where on the Periodic Table? Polonium is in the metalloid group (lower right side)
Dilute Acids: http://www.answers.com/Q/What_is_a_dilute_acid
Polonium Facts: http://www.chemicool.com/elements/polonium.html
Elements Book: Gray, Theodore W. (2009). The Elements: A visual exploration of every known atom in the universe. New York: Black Dog & Leventhal Publishers, Inc.
- Element Card: Gray, Theodore W. (2008). The Photographic Card Deck of the Elements.
In order of appearance:
Metal Polonium: http://www.periodictable.com/Items/084.5/index.html
Polonium Compound: http://www.webelements.com/compounds/polonium/polonium_dioxide.html
Curie @ 16: http://www.famousscientists.org/marie-curie/
Sheet Metal: http://www.sayfitness.com/blog/?attachment_id=150
Atomic Heater: http://www.todaystrucking.com/cab-heater