jan 1, 1913 - Final Resolution to Modern Periodic Table

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Henry Moseley (1887-1915) would resolve that the periodic table should not be arranged by atomic mass but instead an atomic number which would fix Mendeleev's table.

Moseley, using an X-Ray gun would discover how to accurate predict the proton count of any given sample using wavelength.

However, he'd be killed in WWI (August 15) and would not contribute any other discoveries.

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