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History of the Periodic Table.pptx - Free Printable

Educational worksheet: History of the Periodic Table.pptx. Download and print for classroom or home learning activities.

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- 1863, Johann Döbereiner, Law of Octaves, Grouped elements with similar properties into sets of 3
- 1869, Dmitri Mendeleev, Modern Periodic Table, Arranged elements in order of increasing atomic number
- 1914, Henry Moseley, Old Periodic Table, Arranged elements based on increasing atomic mass

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