Sep 28, 2017 - crack keygen idm free SMI websites may offer featured articles, pictures, information, digital images, games, surveys, contests and sweepstakes. Promo image Vintage ad/ radium melts snow as well as warming feet! Oil drilling and fracking are big in North America, but they generate a lot of 'brine,' the wastewater that is used to crack open the rocks containing the gas and oil. (That's why it is called fracking, short for Hydraulic Fracturing. Radium is a highly radioactive element and can be extremely dangerous. However, it was once used in many everyday products, including wristwatches and toothpaste, and thought to have curative properties until its intense radioactivity was found to cause adverse health effects. Radium has an abundance of about 1 part per trillion in the Earth's crust, according to. Trace amounts of radium are found in uranium ore, because radium is created from the decay of the uranium atom, which then into several other unstable elements before finally ending in the element lead. There are several known isotopes of radium, but due to the rapid decay rates of many of the isotopes, it is uncertain about the natural abundances of the radium isotopes. Radium Credit: History Marie and Pierre Curie, Polish and French chemists, discovered radium in 1898, according to. The discovery came from the study of (a type of uranium ore) found in Bohemia (today's Czech Republic). The uranium was removed from the ore and the remains were found to still be radioactive. The radioactive remains were then separated out and when the spectrum was studied, the material was found to be primarily barium with an unknown element. According to, a Dutch historian, the element was named for the Latin word 'radius' or 'ray' because the radiation emitted from the new element was about 3 million times greater than the radiation from uranium. The Curies were able to extract about 1 milligram of radium from nearly 10 tons of pitchblende, according to the. Pure radium was isolated in 1902 by electrolysis by Marie Curie and Andre Debierne, a French chemist, according to. Radium E, known to be bismuth-210, was the first synthetic radioactive element that was created synthetically by scientists at the University of California, according to. • According to, radium has an abundance in the Earth's crust about 1 part per trillion by weight. This makes it the 84 thmost abundant element in Earth's crust according to. • Radium is the heaviest alkaline earth metal, according to. The other alkali earth metals include beryllium, magnesium, calcium, strontium and barium. • Radium changes from a silvery white color to black when exposed to air, according to due to oxidation. • According to, the radium isotope that has the longest half-life is radium-226 with a half-life of 1602 years. • According to the, radium typically enters the body when it is breathed in or swallowed. Health effects from radium exposure include cancer, anemia, cataracts, and death. • Radium emits (two protons and two neutrons bonded together), (high energy electrons or positrons), and (the most energetic wavelength of light), according to. • According to the, radium is in the same group as calcium and is sometimes used to target bone cancer. Alpha particles emitted by the radium kills the cancerous cells. • Radium is primarily extracted as a byproduct in uranium mining, according to the Royal Society of Chemistry. Most of the radium comes from uranium mines in Democratic Republic of Congo and Canada. • According to, radium is extracted today from uranium ores in much the same way that Marie and Pierre Curie did in the late 1890s and early 1900s. • According to, radium was used in clocks to paint the numbers and the hands so that they were visible in the dark. This practiced ceased after too many factory workers died from exposure.
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