1 Jan 1913 Jahr - HENRY MOSELEY (1887-1915 CE) date of discovery (1913 CE) His work was used to reorganize the periodic table based upon atomic number instead of atomic mass. He used x-ray tubes to determine the charges on the nuclei of most atoms. Created the world’s first atomic battery (beta cell) and he discovered that an element’s atomic number is identical to how many protons it has.
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1 Jan 1913 Jahr
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~ 112 years ago