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Science

9th -

11thgrade

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20 questions

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  • 1. Multiple Choice
    45 seconds
    1 pt
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    What is the half-life of iodine-131?
    32 days
    8 days
    16 days
    24 days
  • 2. Multiple Choice
    1 minute
    1 pt
    Image

    Which subatomic particle has a negative charge?

    proton

    neutron

    electron

    cybertron

  • 3. Multiple Choice
    30 seconds
    1 pt
    The atomic mass on the periodic table is an average of all the ____ of an element based on abundance.
    protons
    isotopes
    ions
    charges
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