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The scientist who studied X-ray spectra of the elements to reveal their periodicity was Moseley. Henry Moseley conducted experiments in the early 20th century that demonstrated a systematic relationship between the wavelength of X-rays emitted by elements and their atomic number, rather than their Atomic Mass. This work provided a clearer understanding of the Periodic Table and led to the reordering of elements based on atomic number, which is a foundational concept in modern chemistry.

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1mo ago

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