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polonium
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nature : Period VI Department of the main ethnic group (ROS) elements. Atomic number 84. Radioisotope : 209 α, β , 210 α so. Amu 208.9824. The silver-white metal. Polonium 210 is the most important natural isotope; The half-life of 138.4 days. By Marie Curie discovered in 1898. Trace polonium existed in uranium ore, salt solution or compact radon decay products. The density of α-Type : 9.32. The boiling point 962 ° C. 254 ° C melting point. Chemical properties and tellurium and bismuth similar. Valence is -2, +2, +4, +6, with the most stable +4. Polonium easily hydrolyzed compounds and reduction. The radioactive polonium-than CDs, as alpha ray sources. The deposition of polonium beryllium, used for neutron source. Also used to eliminate static agent. Aerospace equipment, as well as the heat source. Polonium can be used zinc chloride reduction derived. In addition, synthetic polonium.


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1) Polonium
2) polonium
3) polonium
4) Acaricidal Lung
5) Po-Be neutron source
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