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Mendeleev treated the hydrides and oxide...

Mendeleev treated the hydrides and oxides of element as the basic properties of elements for their classification.

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During the time when Mendeleev gave his periodic table, atomic numbers and electronic configurations were not known. Comparison of properties of elements could be best done by comparing their compounds. He selected oxides and hydrides because oxygen and hydrogen form compounds with most of the elements due to their high reactivity.
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Knowledge Check

  • Chemical properties of elements depend on

    A
    their atomic mass
    B
    their valence-shell electronic configuration
    C
    their electronic configuration
    D
    none of above

  • According to the Periodic law of elements, the variation in properties of elements is related to their

    A
    Nuclear masses
    B
    Atomic numbers
    C
    Nuclear neutron-proton number ratio
    D
    Atomic masses.

  • The least stable hydride of 15th group elements is

    A
    `NH_(3)`
    B
    `PH_(3)`
    C
    `AsH_(3)`
    D
    `BiH_(3)`