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13 September, 19:27

Which of these is an element, oxygen, sodium chloride, water, or air

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  1. 13 September, 19:42
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    Oxygen is a chemical element

    sodium chloride (table salt) is an element too
  2. 13 September, 19:44
    0
    Oxygen and sodium are the only ones that are elements here example like the others air is a mixture of a compound and an element
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