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Which group of elements was not known at...

Which group of elements was not known at the time when Mendeleev created his periodic table ?

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Knowledge Check

  • The number of elements known at that time when Mendeleev arranged them in the periodic table was

    A
    63
    B
    60
    C
    71
    D
    65

  • The number of elements known at that time when Mendeleev arranged them in the periodic table was:

    A
    63
    B
    60
    C
    71
    D
    65

  • Which of the following elements were not known when Mendeleev published his periodic table?

    A
    Lanthanodis
    B
    Actinoids
    C
    Noble gases
    D
    Noble metals

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    (a) State Mendeleev's periodic law. What chemical properties of elements were used by Mendeleev in creating his periodic table? (c) State any three limitations of Mendeleev's classification of elements. (d) Besides gallium, which two other elements have since been discovered for which Mendeleev had left gaps in the periodic table? (e) Which group of elements was missing from Mendeleev's original periodic table?

    What were the criteria used by Mendeleev in creating his Periodic Table?

    What were the two criteria used by Mendeleev in creating his periodic table?

    What are the limitations of Mendeleev's periodic table?

    The number of element discovered when Mendeleev proposed his periodic table was

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