Science

7th

grade

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Chemistry Basics

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20 questions

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  • Multiple Choice
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    30 seconds
    1 pt

    How many Hydrogen atoms are in 4H2O?

    6

    8

    2

    4

  • Multiple Choice
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    30 seconds
    1 pt

    How many Oxygen atoms are in H2O?

    1

    2

    0

    4

  • Multiple Choice
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    30 seconds
    1 pt

    How many Magnesium atoms are in 10MgCl2?

    10

    5

    20

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