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Chemistry

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Chemistry assignment

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5 questions

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  • 1. Multiple Choice
    30 seconds
    1 pt

    What's the lightest element in the periodic table?

    Helium

    Hydrogen

    Air

    Neutron

  • 2. Multiple Choice
    20 seconds
    1 pt

    What is the atomic number of carbon?

    2

    6

    12

    14

  • 3. Multiple Choice
    1 minute
    1 pt
    Image
    In the picture, what is the atomic number for Sodium?
    11
    22.9
    Na
    none of the above
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