Mercury(I) oxide

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Notion

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Science and technology

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What Wikipedia says

Mercury(I) oxide, also known as mercurous oxide, is an inorganic metal oxide with the chemical formula Hg2O.

Excerpt from the Wikipedia article “Mercury(I) oxide”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Nucleus hydro elemon, Public domain, via Wikimedia Commons.