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28 June, 18:43

Discribe two differences between medeleevs periodic table and modern periodic table

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  1. 28 June, 20:37
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    1. in the modern periodic table, the elements are arranged in order of increasing atomic number (In Mendeleev's table, they were arranged in order of increasing atomic weight).

    2. More elements are in the modern periodic table which have been discovered since Mendeleev's.

    3. There are no gaps. The gaps in Mendeleev's have been filled by the elements that were discovered.

    4. The transition elements are listed in a separate block where as Mendeleev's included them with the other elements.
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