on which property of elements is based to design Mendeleffe periodic table
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◆Atomic mass
His organization of elements was based on atomic mass. Mendeleev's periodic table made it possible to predict properties of elements that had not yet been discovered
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The main differences are: the periodic table of Mendeleev is based on atomic mass. The current periodic table is based on the number of atoms. Noble gasses (as they are not found at that time) were not included in Mendeleev's periodic table. In Modern periodic table noble gasses in a separate group called group-18.
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