Prices of chemical elements - Wikipedia
In the form of anthracite, price per carbon contained, assuming 90% carbon content. There is a wide variation of price of carbon depending on its form. Lower ranks of coal can be less expensive, for example sub-bituminous coal can cost around 0.038 USD/kg carbon. Graphite flakes can cost around 0.9 USD/kg carbon. Radium weighs 5.5 gram per cubic centimeter or 5 500 kilogram per cubic meter, i.e. density of radium is equal to 5 500 kg/m³; at 20°C (68°F or 293.15K) at standard atmospheric pressure. In Imperial or US customary measurement system, the density is equal to 343.35 pound per cubic foot [lb/ft³], or 3.2 ounce per cubic inch [oz/inch³] . Jul 20, 2020 · At some point in 2008 its price even reached over $10,000 per ounce. These prices, however, declined during the global financial crisis that started during this time. As of March 9, 2016, the price stands at about $685 per troy ounce. It’s still relatively expensive because it is very rare. Natural polonium, Po-210, is still very rare and forms no more than 100 billions of a gram per ton of uranium ore. Because it is so rare, polonium is made by first making bismuth (also found in pitchblende). Bismuth-209 is found and then artificially changed to bismuth-210 which then decays to form polonium-210. terabecquerel (TBq), for instance, is equal to 1 x 10 12 disintegrations per second. Polonium-210 has a very high specific activity—activity per unit mass—of about 166 TBq per gram (4,490 curies, Ci, per gram). In other words, it doesn’t take a large physical amount to be very radioactive.
Polonium | Po (Element) - PubChem
The average price for selenium in 2000 was $3.82 per pound. Tellurium is a relatively rare element, in the same chemical family as oxygen, sulfur, selenium, and polonium: oxygen and sulfur are nonmetals, polonium is a metal, and selenium and tellurium are semiconductors (i.e., their electrical properties are between those of a metal and an Originally, polonium-210 was obtained from the rich pitchblende ore found in Bohemia, but it can also be obtained from aged radium salts that contain about 0.2 mg per gram of radium. Although a number of other polonium isotopes are present in the natural decay series, their short half-lives preclude any appreciable concentrations. On average, exposure of acute polonium radiation of around 4.5 Sv is considered as the lethal dose (LD 50). The biological half-life of polonium-210 is around 50 days and the lethal does of polonium-210 is 0.089 microgram. Theoretically, one 1 gram of polonium-210 can adverse effect 20 million people and half of them will die . Isotopes of Polonium's most stable isotope, polonium-209, has a half-life of 102 years. It decays into lead-205 through alpha decay. Polonium-209 is available from Oak Ridge National Laboratory at the cost of about $3200 per microcurie.
Polonium is a radioactive element that exists in two metallic allotropes.The alpha form is the only known example of a simple cubic crystal structure in a single atom basis at STP, with an edge length of 335.2 picometers; the beta form is rhombohedral. The structure of polonium has been characterized by X-ray diffraction and electron diffraction.. 210 Po (in common with 238 Pu [citation needed
The declared characteristics are strictly mutually exclusive: Radioactive, density 20-20 g/cc, is explosive, is used in atomic weapons, the cost of a million dollars per gram (California costs $6.5 m per gram, and what organics-and $16 m for Gram , but California and this organics are products of complex synthesis, and the red mercury, first