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4 Cards in this Set
- Front
- Back
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Mendeleev
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-Used experimental data on chemical properties of elements and their elements => concluded that chemical properties vary periodically with increasing relative atomic weights
- Predicted the properties of three unknown elemnts |
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How Mendeleev Constructed the Table
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-Arranged elements with similar properties into vertical groups
- Arranged elements in order of relative atomic mass into horizontal periods |
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Henry Mosely
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- Rearranged the periodic table once atomic numbers were defined
- Elements with similar chemical properties were still grouped together - Elements were placed in order of increasing atomic number instead of mass |
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Glenn Seaborg
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-Completed the periodic table to its modern form with his discovery of many of the trans-uranium elements
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