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.
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.
However, an indicator that the polonium may be synthetic is if there was far less Pb-210 (lead-210) in the samples.
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.
Polonium, apparently ingested with food, was found to have caused the death of former Russian spy Alexander Litvinenko in London in 2006.
Former Palestinian leader Yasser Arafat's body has been exhumed and is being tested for Polonium poisoning by an international team of experts.
The cause of death has been attributed to a stroke but a media documentary suggested last month that Arafat was poisoned by polonium, a toxic, radioactive substance used already against Russian dissidents.
L'institut de radiophysique de Lausanne a annonce hier vendredi qu'il comptait examiner la depouille de Yasser Arafat apres le feu vert de sa veuve afin de rechercher d'eventuelles traces de polonium, une substance radioactive hautement toxique.
com)-- The recent blockbuster news story that Yasser Arafat may have been poisoned by polonium was itself a fabrication.
In light of the new findings, and especially if polonium was found on Arafat's exhumed body, the Palestinian Authority should urge the UN Security Council to adopt a resolution, mirroring a 2006 resolution, which appointed an international commission to probe the killing of former Lebanese premier Rafiq Hariri.
Polonium-210 is found naturally in uranium ores, as it is formed as part of the route by which atoms of uranium decay to lead, although as explained later this was not the source of the polonium which killed Litvinenko.