Chemistry

9th

grade

Image

structure of atom

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20 questions

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  • 1. Multiple Choice
    1 minute
    1 pt
    Which element has 31 protons ?
    Gallium 
    Germanium
    Gadolinium
    Polonium
  • 2. Multiple Choice
    1 minute
    1 pt
    Image
    What number indicates the nucleus?
    1
    2
    3
    4
  • 3. Multiple Choice
    30 seconds
    1 pt
    What is at the center of every atom?
    An electron
    A compound
    A molecule
    A nucleus
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