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Chemical change   /kˈɛməkəl tʃeɪndʒ/   Listen
Chemical change

noun
1.
(chemistry) any process determined by the atomic and molecular composition and structure of the substances involved.  Synonyms: chemical action, chemical process.






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"Chemical change" Quotes from Famous Books



... is not brass," he said, "and of course it cannot possibly be phosphor-bronze. But, if such a thing were a metallurgical possibility, I should say that it was gold—treated in some manner that gives it as great a hardness as bronze receives when treated with phosphorus, but with some chemical change wrought in its constitution that gives it also the tempered quality of steel. Nothing but gold, you see," he added, "could lie around out-of-doors this way and not get tarnished ...
— The Aztec Treasure-House • Thomas Allibone Janvier

... on certain fishes, or locally inoculated with the poison of a toad. I am far from wishing to maintain that the moss-rose or the hard shell of the peach-stone or the bright colours of birds are actually due to any chemical change in the sap or blood; but these cases of galls and of parrots are excellently adapted to show us how powerfully and singularly external agencies may affect structure. With such facts before us, we need feel no surprise at the appearance of ...
— The Variation of Animals and Plants Under Domestication, Volume II (of 2) • Charles Darwin



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