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Polonium-210 (210 Po, Po-210, historically radium F) is an isotope of polonium. It undergoes alpha decay to stable 206 Pb with a half-life of 138.376 days (about 4 + 1 ⁄ 2 months), the longest half-life of all naturally occurring polonium isotopes ( 210–218 Po). [ 1 ]
Polonium can be found in uranium ores at about 0.1 mg per metric ton (1 part in 10 10), [51] [52] which is approximately 0.2% of the abundance of radium. The amounts in the Earth's crust are not harmful. Polonium has been found in tobacco smoke from tobacco leaves grown with phosphate fertilizers. [53] [54] [55]
polonium-211m2: 243 radon-214m: 245 fluorine-31: 250 uranium-239m1 >250 bismuth-197m4: 253 fluorine-30: 260 nitrogen-25: 260 polonium-210m: 263 bismuth-197m3: 263 lead-204m1: 265 astatine-214m1: 265 radium-208m: 270 lead-196m4: 270 radon-214: 270 uranium-238m: 280 curium-245m: 290 thallium-192m2: 296 polonium-212: 299 protactinium-220m1: 308 ...
Decay Scheme of 210 Po. Here, to the left, we now have an alpha decay. It is the decay of the element Polonium [6] discovered by Marie Curie, with mass number 210. The isotope 210 Po is the penultimate member of the uranium-radium-decay series; it decays into a stable lead-isotope with a half-life of 138 days.
There are 42 isotopes of polonium (84 Po). They range in size from 186 to 227 nucleons. They are all radioactive. 210 Po with a half-life of 138.376 days has the longest half-life of any naturally-occurring isotope of polonium and is the most common isotope of polonium. It is also the most easily synthesized polonium isotope.
Like most radioisotopes found in the radium series, 206 Pb was initially named as a variation of radium, specifically radium G. It is the decay product of both 210 Po (historically called radium F) by alpha decay, and the much rarer 206 Tl (radium E II) by beta decay.
Doctors say that Scaramella was exposed to a much lower level of polonium-210 than Litvinenko, and that preliminary tests found "no evidence of radiation toxicity". [142] According to the 6 pm Channel 4 news (9 December 2006), the intake of polonium he suffered would only result in a dose of 1 millisievert (100 mrem ).
Organopolonium chemistry describes the synthesis and properties of chemical compounds containing a carbon to polonium chemical bond.. As polonium is a highly radioactive element (its most commonly used isotope, 210 Po, has a half-life of about 138 days), organopolonium chemistry is mostly unexplored, and what is known is mostly confined to tracer-level studies due to self-destruction and ...