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3h 26min, jan 29, 1909 y - studied protons in the periodic table

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http://freedomtoteach.collins.co.uk/chemistry-in-1913-part-1-henry-moseley-and-atomic-number/

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henry moseley timeline

BySTUDENT Quincy Jackson

1 Dec 2017

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3h 26min, jan 29, 1909 y

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~ 116 years ago

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