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26 April, 10:50

Which of the following is a noble gas? carbon dioxide, boron, oxygen, and helium

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  1. 26 April, 11:43
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    Carbon dioxide is a noble gas.
  2. 26 April, 12:23
    0
    Helium is a nobel gas carbon dioxide is a compound boron I think is a metal oxgen is not a nobel gas I know the periodic table of elements like its the back of my hand I'm only14
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