Chemistry, Biology, Science

10th

grade

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10 CBSE RIDERS

14
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10 questions

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  • 1. Multiple Choice
    30 seconds
    1 pt

    What is the chemical symbol of Sodium element?

    S

    Se

    Na

    Mg

  • 2. Multiple Choice
    30 seconds
    1 pt

    The atomic number of calcium element is

    10

    20

    30

    18

  • 3. Multiple Choice
    30 seconds
    1 pt

    The valence electrons in the element Nitrogen N

    5

    3

    2

    1

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