- a radioactive element discovered by Pierre and Marie Curie in 1898; Symbol: Po; atomic number: 84; atomic weight: about 210.
Origin of polonium
Examples from the Web for polonium
Once the polonium had been recognized, police were able to trace the source of the poison to the Millennium hotel in Mayfair.Brits Investigate Assassination of the Spy Who Warned Us About Putin
July 22, 2014
Did he understand that he would now have to live with a sword—not of Damocles but of polonium—hanging over his head?The Mystery of Mikhail Khodorkovsky
January 2, 2014
Polonium is also at the center of a major plot line currently playing out on the daytime soap opera General Hospital.Radioactive Revelations Raise the Question: Who Killed Arafat?
November 8, 2013
But their tests were for gamma, not alpha, radiation, so they naturally would have missed any polonium diagnosis.Bringing Up Yasir Arafat’s Body
November 24, 2012
The accuser also mentioned that Arafat had been poisoned with polonium.Israel Didn't Kill Arafat
July 10, 2012
Polonium, named by Mme. Curie in honor of her native country, was the third radioactive element to be discovered.An Introduction to the History of Science
- a very rare radioactive element that occurs in trace amounts in uranium ores. The isotope polonium-210 is produced artificially and is used as a lightweight power source in satellites and to eliminate static electricity in certain industries. Symbol: Po; atomic no: 84; half-life of most stable isotope, 209 Po: 103 years; valency: –2, 0, 2, 4, or 6; relative density (alpha modification): 9.32; melting pt: 254°C; boiling pt: 962°C
Word Origin and History for polonium
radioactive element, 1898, discovered by Marie Curie (nee Skłodowska), 1867-1934, and her husband, and named for her native country, Poland (Modern Latin Polonia). With element-name ending -ium.
- A naturally radioactive metallic element, occurring in minute quantities in uranium ores; its most readily available isotope is Po 210, with a half-life of 138.39 days. Atomic number 84.
- A very rare, naturally radioactive, silvery-gray or black metalloid element. It is produced in extremely small amounts by the radioactive decay of radium or the bombardment of bismuth or lead with neutrons. Atomic number 84; melting point 254°C; boiling point 962°C; specific gravity 9.20; valence 2, 4. See Periodic Table.