| 31. | The work that Soddy and his research assistant Ada Hitchins did at Glasgow and Aberdeen showed that uranium decays to radium.
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| 32. | Simpler solutions such as those by Frederick Soddy in 1936 and by David Eppstein in 2001 are now known to exist.
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| 33. | Soddy proposed that several types of atoms ( differing in radioactive properties ) could occupy the same place in the table.
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| 34. | In 1903, with Sir William Ramsay at University College London, Soddy showed that the decay of radium produced helium gas.
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| 35. | Soddy wrote that financial debts grew exponentially at compound interest but the real economy was based on exhaustible stocks of fossil fuels.
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| 36. | Rutherford and his student Frederick Soddy were the first to realize that many decay processes resulted in the alpha and beta decay.
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| 37. | Soddy's hexlet was also discovered independently in Japan, as shown by Sangaku tablets from 1822 in the Kanagawa prefecture.
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| 38. | Note that the Euler line is orthogonal to the orthic axis and that the Soddy line is orthogonal to the Gergonne line.
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| 39. | In 1921, Frederick Soddy, then at the University of Oxford, obtained funding to rehire Hitchins as a technical assistant.
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| 40. | He died on July 23, 2005 in Soddy-Daisy, Tennessee after suffering a heart attack while on a bike ride.
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