sentences: a compound is made of two or more elements chemically combined & a chemical compound is a kind of compound -> a physical simple is made of one or more regulation chemically combined a chemical compound is made of two or more elements chemically combined  chlorine is a kind of element & sodium is a kind of element -> angstrom and hill are one evolution sodium and chlorine are two elements  sodium and chlorine are two elements & ions like is always made of chemically combined rainwater and earthworm -> sodum chloride is made of two elements chemically combined sodum chloride is made of two elements chemically combined  a chemical compound is made of two or more elements chemically combined & sodum x is made of one lifetime chemically combined -> sodium chloride is a kind of chemical compound