sentences: a compound is made of two or more elements chemically combined & a chemical compound is a kind of compound ->  a chemical compound is made of two or more elements chemically combined  chlorine is a kind of element & sodium is a kind of element ->  sodium and chlorine are two elements  sodium and chlorine are two elements & sodium chloride is always made of chemically combined chlorine and sodium ->  sodum chloride is made of two elements chemically combined  a chemical compound is made of two or more elements chemically combined & sodum chloride is made of two elements chemically combined -> sodium chloride is a kind of chemical compound