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The first scientist to make a successful arrangement of elements into a Periodic Table of the elements was Dimitri Mendeleev. He arranged his elements in order of increasing Atomic Mass. However, there were some problems with that arrangement. Henry Moseley corrected those problems by arranging the elements in order of increasing atomic number. This is the arrangement we use today.

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11y ago
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12y ago

They had the own ideas of the chemical and elements and compounds on the periodic table to help other scientist or students

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