Chemistry

10th

grade

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ICSE semester 1

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41 questions

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  • Multiple Choice
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    30 seconds
    1 pt

    An atom of an element has the electronic configuration 2,8,2. To which group does it belong ?

    4 Th group

    6 Th group

    3 rd group

    2 nd group

  • Multiple Choice
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    30 seconds
    1 pt

    Carbon belongs to the second period and group 14. Silicon belongs to the third period and group 14. If atomic number of carbon is 6, the atomic number of silicon is :

    7

    14

    24

    16

  • Multiple Choice
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    30 seconds
    1 pt

    Pick out the chemically most reactive elements from the given elements

    Li, Na, K, F, Cl, Br

    Li and F

    Li and Br

    K and F

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