- a radioactive element discovered by Pierre and Marie Curie in 1898; Symbol: Po; atomic number: 84; atomic weight: about 210.
- 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
More Definitions
- ADANA (noun) Definition, Meaning & Examples
- COCH. AMP. (noun) Definition, Meaning & Examples
- HERE, THERE, AND EVERYWHERE (noun) Definition, Meaning & Examples
- SQUAMULOSE (noun) Definition, Meaning & Examples
- COQUILLE (noun) Definition, Meaning & Examples
- CHALK LINE (noun) Definition, Meaning & Examples