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Write the drawbacks in Mendeleev’s periodic table that led to its modification.

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The periodic table proposed by Mendeleev was based on similar properties of elements 1. which caused placing elements with higher atomic number before lower one and 2. similar elements were placed in different groups whereas different elements were in same groups. 3. The position of hydrogen and 4. Isotopes...
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The periodic table proposed by Mendeleev was based on similar properties of elements 1. which caused placing elements with higher atomic number before lower one and 2. similar elements were placed in different groups whereas different elements were in same groups.3. The position of hydrogen and 4. Isotopes were not certain. read less
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