1. It is the simplest type of matter. 2. It is made up of two or more elements 3. It has a definite composition and unique set of properties 4. It occupies space and has mass 5. It is a compound made up of sodium and chlorine 6. It is one of the components of water when broken down. 7. An example of element that is a metal 8. Compounds can be classified as or base. 9. The smallest indivisible particle that makes up everything 10. A compound that is formed when iron reacts with oxygen​