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21 August, 12:52

Why h2o and co2 not on the periodic table

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  1. 21 August, 15:51
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    They are a combination of two or more elements
  2. 21 August, 16:02
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    They are combinations of two or more elements. h₂o is water 2 hydrogen atoms and one oxygen atom. co₂ is carbon dioxide carbon one carbon atom and two oxygen atoms.
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