arsenic trisulfide

arsenic trisulfide

noun Chemistry.
a yellow or red crystalline substance, As2S3, occurring in nature as the mineral orpiment, and used as a pigment (king's yellow) and in pyrotechnics.

Origin:
1905–10
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Arsenic trisulfide is always a great word to know.
So is oxidation. Does it mean:
the process or result of a chemical reaction to oxygen, or the deposit that forms on the surface of a metal as it oxidizes
the molecular weight of a substance expressed in grams; a gram molecule
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