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

/po·lo·ni·um/ (Po) (pah-lo´ne-um) chemical element, at. no. 84.

polonium (Po)

[pəlō′nē·əm]
Etymology: Polonia, Poland
a radioactive element that is one of the disintegration products of uranium. Its atomic number is 84; its atomic mass is approximately 210.

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]

polonium

a chemical element, atomic number 84, atomic weight 210, symbol Po. See Table 6.
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References in periodicals archive ?
There are few known cases of polonium poisoning, the most famous recent example being that of defecting Russian spy Alexander Litvinenko, who drank a poisoned cup of tea in a London hotel in 2006.
The professor highlighted results from two samples - the shroud under the corpse of Mr Arafat and urine samples taken from his underwear - both showed high levels of Po-210 compared to Pb-210, possibly suggesting the presence of "additional" synthetic polonium.
It said polonium levels in "bones and soft tissues were up to 20 times larger than references in the literature", firmly ruling out the possibility previously reported in some media that cigarette smoke had caused greater than normal polonium levels among Arafat's personal effects.
Bruce Goldberger, director of health forensic medicine at the University of Florida, said the report was appropriately cautious in saying it had found moderate support for the idea that polonium poisoning killedArafat.
It added that polonium levels in "bones and soft tissues were up to 20 times larger" than hypothesized, firmly ruling out the possibility previously reported in some media that passive smoking had caused greater than normal polonium levels on Arafat's personal effects.
French magistrates opened a murder inquiry in August into Arafat's death in Paris after a Swiss institute said it discovered high levels of radioactive polonium on his clothing, which was supplied by his widow, Suha.
Arafat's belongings, according to Arab media "Al-Jazeera", showed high traces of polonium and his symptoms were allegedly consistent with poisoning.
Le polonium est une substance radioactive hautement toxique, qui a servi a l'empoisonnement en 2006 a Londres d'Alexandre Litvinenko, un ex-espion russe devenu opposant au president Vladimir Poutine.
When Dunkerley looked into that coverage, he found that the surprising stories that Arafat, like Litvinenko, may have died of polonium poisoning were fabricated.
Scotland Yard spent nearly pounds 1m investigating the murder of the Russian dissident, who was killed with radioactive polonium.
Breakfast With Polonium, a novel by husband and wife Alexander and Natalya Pankov, inspired by the murder of Alexander Litvinenko, a former Russian intelligence agent, has gone on sale in Russia.