Science

10th

grade

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Periodic classification of elements

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  • 1. Multiple Choice
    30 seconds
    1 pt

    Which one of the following is a Dobereiner Triad?

    Na,Ca,Al

    Li,Na,Ca

    Li,Na,K

    F,Cl,Br

  • 2. Fill in the Blank
    1 minute
    1 pt

    In Newlands classification Periodicity of properties is lost after_______element.

  • 3. Multiple Choice
    45 seconds
    1 pt

    In Mendeleev's Periodic Table how many periods and groups are present?

    6 periods, 8 groups

    6 groups, 8 periods

    7 periods, 8 groups

    7 groups, 8 periods

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