Science

7th -

8thgrade

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Chemical Reactions and Equations

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17 questions

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  • 1. Multiple Choice
    30 seconds
    1 pt

    What happens in a chemical reaction?

    Bonds between atoms break and/or are formed

    New atoms are created and/or removed

    Protons move from one atom to another

    Electrons change into protons

  • 2. Multiple Choice
    30 seconds
    1 pt

    How are chemical bonds formed?

    Atoms duplicate themselves

    Electrons move from one atom to another

    The number of protons and electrons in an element is changed

    Through changes in an atom's nucleus

  • 3. Multiple Choice
    30 seconds
    1 pt

    Which of the following would indicate that a chemical reaction has occurred?

    A new element has been created

    A different substance has formed

    The total mass has either increased OR decreased

    The total number of elements has either increased OR decreased

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