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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 ( space group Pm 3 m, no. 221). The unit cell has an edge length of 335.2 picometers; the beta form is rhombohedral.
Apr 25, 2024 · polonium (Po), a radioactive, silvery-gray or black metallic element of the oxygen group (Group 16 [VIa] in the periodic table ). The first element to be discovered by radiochemical analysis, polonium was discovered in 1898 by Pierre and Marie Curie, who were investigating the radioactivity of a certain pitchblende, a uranium ore.
Nov 7, 2013 · Very. If ingested, it is lethal in extremely small doses. A minuscule amount of the silver powder is sufficient to kill. British radiation experts say once polonium-210 enters the bloodstream, its ...
Dec 6, 2018 · Polonium (Po) is a very rare and highly volatile radioactive metal. Before Polish-French physicist Marie Curie 's discovery of polonium in 1898, uranium and thorium were the only known radioactive ...
Polonium is an alpha-emitter, and is used as an alpha-particle source in the form of a thin film on a stainless steel disc. These are used in antistatic devices and for research purposes. A single gram of polonium will reach a temperature of 500°C as a result of the alpha radiation emitted.
Mar 9, 2024 · Polonium has metallic character similar to its horizontal neighbors on the periodic table: lead, strontium, and bismuth. Isotopes. Polonium has 42 known isotopes, ranging from atomic mass 186 to 227. All of the isotopes are radioactive. Po-210 is the most widely known, produced by neutron capture by bismuth.
