polonium

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polonium

 (Po) [pah-lo´ne-um]
a chemical element, atomic number 84, atomic weight 210. (See Appendix 6.)

po·lo·ni·um (Po),

(pō-lō'nē-ŭm),
A radioactive element, atomic no. 84, isolated from pitchblende; the longest-lived isotope is 209Po (half-life 102 years); 210Po is radium F (half-life 138.38 days), the only readily accessible isotope.
[L. fr. Polonia, Poland, native country of Mme. M.S. Curie who with her husband, P. Curie, discovered the substance]

polonium

A rare and highly radioactive chemical element (atomic number 84) discovered by Marie Curie, which has 33 distinct radioactive isotopes. It is an alpha particle emitter with a half-life of 138.4 days that decays directly to its stable daughter isotope, 206Pb, and has such a high energy of emission that it has been used to heat satellites and vehicles in outer space. 210Polonium is 250,000 times more toxic than hydrogen cyanide (HCN): the LD50 for an 80 kg person is 1µg of 210Po compared to 250 mg for HCN.

po·lo·ni·um

(Po) (pŏ-lō'nē-ŭm)
A radioactive element, atomic no. 84, isolated from pitchblende; the longest-lived isotope is 209Po (half-life 102 years); 210Po is radium F (half-life 138.38 days), the only readily accessible isotope.
[L. fr. Polonia, Poland, native country of Mme. Marie S. Curie who with her husband, Pierre Curie, discovered the substance]
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References in periodicals archive ?
Over the past week, traces of polonium 210, which was found in a sample of Mr Litvinenko's urine, have been detected at 12 sites, including three British Airways planes which have flown between the UK and Russia.
Cameras outside 25, Grosvenor Street, a property which Alexander Litvinenko is known to have visited, and where traces of polonium 210 have been found Picture: ANDREW PARSONS
A "significant quantity" of polonium 210 was found in Mr Litvinenko's urine following extensive tests by forensic toxicologists.
A large quantity of alpha radiation from polonium 210 was detected in Alexander Litvinenko's urine, apparently just a few hours prior to his death on Thursday night.
Leaf tobacco contains minute amounts of lead 210 ([sup.210]Pb) and polonium 210 ([sup.210]Po) both of which are radioactive carcinogens and both of which can be found in smoke from burning tobacco.
Marina Litvinenko called on leaders meeting in Germany today to drive home the case for the extradition of former KGB agent Andrei Lugovoy to Britain accused of poisoning her husband with radioactive polonium 210.
Litvinenko's throat blistered, his tongue became too swollen to fit inside his mouth and his hair fell out before his agonising death from polonium 210 poisoning on November 23.
But his work was cut short when he was poisoned with radioactive polonium 210 in London.
German investigators have found evidence of radioactive polonium 210 in a car and Hamburg apartment both used by Mr Kovtun before he departed for London on November 1 to meet Mr Litvinenko.
The nine officers are planning to interview a number of potential witnesses in the inquiry, including those who met Mr Litvinenko on the day he was allegedly poisoned with polonium 210.
Mr Gaidar fell mysteriously ill at a conference in Maynooth College last week and it was feared he had been poisoned with radioactive polonium 210, which killed ex-KGB spy Alexander Litvinenko.