<P> A pure chemical compound is a chemical substance that is composed of a particular set of molecules or ions . Two or more elements combined into one substance through a chemical reaction form a chemical compound . All compounds are substances , but not all substances are compounds . </P>
<P> A pure chemical compound is a chemical substance that is composed of a particular set of molecules or ions . Two or more elements combined into one substance through a chemical reaction form a chemical compound . All compounds are substances , but not all substances are compounds . </P>
a process in which at least one new substance is produced as a result of chemical change
a process in which at least one new substance is produced as a result of chemical change
chemical reaction
chemical reaction