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19 May, 09:39

Why h2o and co2 not on the periodic table

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  1. 19 May, 12:01
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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.
  2. 19 May, 13:14
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    They are a combination of two or more elements
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