kahe või enama elemendi aatomeist koosnev keemiliselt iseseisev aine (liitaine, näiteks H2SO4)
a chemical substance which is formed by the union of elements in definite proportion by weight, with definite structural arrangement, whose molecules consist of unlike atoms and whose constituents cannot be separated by physical means
Keemiliste ühendite struktuurivalemite kirjutamisel kasutatakse elementide üldkasutatavaid sümboleid ja näidatakse täpselt ära sidemed elementide ja radikaalide vahel.
Compounds can be broken down into their constituent elements by chemical changes. A chemical change (that is, a chemical reaction) is one in which the organization of the atoms is altered.
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