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Weymouth, Dorset, England.
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He observed & measured the x-ray spectra of various chemical elements obtained by diffaction in crystals.
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He sorted chemical elements in the order of their atomic number.
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A systematic relation between wavelenght & atomic number.
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Using atomic number instead of atomic mass as the organizing principle was first proposed by the British chemist Henry Moseley in 1913, and it solved anomalies like this one.
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He joined the British Army during the World War & on August 10, 1915 he was shoy dead. he was 27 years old.
