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[puh-loh-nee-uh m] /pəˈloʊ ni əm/

noun, Chemistry.
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, 209Po: 103 years; valency: –2, 0, 2, 4, or 6; relative density (alpha modification): 9.32; melting pt: 254°C; boiling pt: 962°C

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.

polonium po·lo·ni·um (pə-lō’nē-əm)
Symbol Po
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; melting point 254°C; boiling point 962°C; specific gravity 9.32; valence 2, 4.
Symbol Po
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 9.32; valence 2, 4. See Periodic Table.


Read Also:

  • Polonius

    [puh-loh-nee-uh s] /pəˈloʊ ni əs/ noun 1. the sententious father of Ophelia in Shakespeare’s Hamlet.

  • Polonize

    [poh-luh-nahyz] /ˈpoʊ ləˌnaɪz/ verb (used with object), Polonized, Polonizing. 1. to make Polish; cause or force to take on ways, customs, viewpoints, etc., that are characteristically Polish. 2. to alter (a word or phrase) so that it becomes Polish in form or character.

  • Polony

    /pəˈləʊnɪ/ noun (pl) -nies 1. (Brit) another name for bologna sausage

  • Polonnaruwa

    [poh-luhn-uh-roo v-uh] /poʊˌlʌn əˈrʊv ə/ noun 1. a town in E central Sri Lanka: Buddhist ruins.

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