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A substance composed of more than one chemical element, whose atoms are held together by strong chemical bonds and are combined in a fixed ratio.
A substance composed of more than one chemical element, whose atoms are held together by strong chemical bonds and are combined in a fixed ratio. So water is a compound that always contains two hydrogen atoms for every one oxygen atom. Compounds in general have very different properties to their constituent elements - sugar bears no resemblance to the hydrogen, carbon and oxygen that make up each molecule.
So water is a compound that always contains two hydrogen atoms for every one oxygen atom. Compounds in general have very different properties to their constituent elements - sugar bears no resemblance to the hydrogen, carbon and oxygen that make up each molecule.