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    Back in the 1940s, the American chemist Willard Libby used this fact to determine the ages of organisms long dead.

    Most carbon atoms have six protons and six neutrons in their nuclei and are called carbon 12. But a tiny percentage of carbon is made of carbon 14, or radiocarbon, which has six protons and eight neutrons and is not stable: half of any sample of it decays into other atoms after 5,700 years.

    Once the acute attack subsides, levels of uric acid can be lowered via lifestyle changes and in those with frequent attacks, allopurinol or probenecid provides long-term prevention.

    Gout affects about 1 to 2% of the Western population at some point in their lives. This is believed to be due to increasing risk factors in the population, such as metabolic syndrome, longer life expectancy and changes in diet. Long-standing elevated uric acid levels (hyperuricemia) may result in other symptoms, including hard, painless deposits of uric acid crystals known as tophi.

    So by measuring carbon 14 levels in an organism that died long ago, researchers can figure out when it died.

    The procedure of radiocarbon dating can be used for remains that are up to 50,000 years old.

    The three share the place in the periodic table assigned to atomic number 1 and hence are called isotopes (from the Greek Sources: G. A few years later, Soddy published a comparison of the atomic masses of the stable element lead as measured in ores rich in uranium and thorium, respectively.

    Painstaking work completed soon afterward revealed, however, that ionium, once mixed with ordinary thorium, could no longer be retrieved by chemical means alone.

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    This occurs due to a combination of diet and genetic factors.At high levels, uric acid crystallizes and the crystals deposit in joints, tendons and surrounding tissues, resulting in an attack of gout.Treatment with nonsteroidal anti-inflammatory drugs (NSAIDs), steroids, or colchicine improves symptoms. Taylor, "Isotopic Compositions of the Elements 1997," J. Uranium ores, for example, yielded ionium, and thorium ores gave mesothorium. These substances were thought to be elements and accordingly received special names.

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