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More than 5000 entries on the history, culture and life of Britain (published in 1993 by Macmillan, now out of print)
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Frederick Soddy
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(1877–1956) Experimental chemist who worked with *Rutherford at McGill in 1900–03 on the disintegration theory of radioactivity. He then became a lecturer at the university of Aberdeen, where he argued that certain elements could exist in two forms chemically identical but with differing atomic weights (he found his first examples in 1906, in two variants of thorium). Others were thinking along the same lines, but it was his name for such substances which stuck; in 1913 he called them isotopes, from the Greek for 'same place' (they occupy the same place in the periodic table). He was awarded the Nobel prize for chemistry in 1921.
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