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Four of us were debating what the actual compounds and terms (scientifically) for water. H2O we all agreed upon until one person said, "..yes and its Hydrogen Dioxide". Myself and 1 of the four challenged that answer by saying, "One does not drink Hydrogen Dioxide"! This turned into an half an hour debate and furious flipping through the internet, (which DID NOT provide a clear and concise answer). Please help make this clear.

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  • $\begingroup$ "Please help make this clear". The "di-" prefix means "two". Given that water is $H_2O$ (Two $H$s and one $O$), I think you are quite capable of clearing things up yourself ;) $\endgroup$ – paracetamol Sep 14 '17 at 13:42
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    $\begingroup$ The very first hit you get by typing 'hydrogen dioxide' in Google yields the answer you were looking for. $\endgroup$ – Bdrs Sep 14 '17 at 14:16
  • $\begingroup$ chemistry.stackexchange.com/questions/53533/… $\endgroup$ – Mithoron Sep 14 '17 at 14:29
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H₂O (Dihydrogen Monoxide) is water, while H₂O₂ (Dihydrogen Dioxide) is Hydrogen Peroxide, a strong and unstable oxidizing agent.

Note: Though your question was met with an answer, this is a really poor question for this website and is likely to be removed, or closed, very soon. I suggest you use general forums for questions of this sort. Meanwhile, you have your answer, but it probably won't be around for long.

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The terminology is such that the term "oxide" means a negative ion with a double negative charge, or oxidation state of -2, on a single oxygen atom. Thus, H2O, known as water, can be interpreted as an oxide, but H2O2 cannot, as the -2 "charge" is equally distributed between both oxygen atoms, meaning each has only -1.
Side fact: F2O is not an oxide either, as oxygen hosts positive charge and has the oxidation state of +2, so the compound should be refered to as OF2 and named oxygen difluoride.

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