science vocabulary

3. the process by which one or more substances change to produce one or more different substances
5. a substance that undergoes change during a chemical reaction
6. the simplest unit of chemical compound that can exist
7. an insoluble solid form by a chemical reaction
9. the smallest particle of an element
10. a single substance either an element or a compound definite composition and properties
12. a substance formed by two or more substances which are chemically bonded during the chemical reaction
13. materials made from one or more natural substances that undergo a chemical reaction
14. physical and chemical characteristics of matter used to describe or identify a substance
15. a substance form during a chemical reaction
16. a characteristic that can only be observed without changing the substance

1. a property that depends on the amount of matter in a sample
2. a system that does not depend on the system size or the amount of material in the system
4. means of changing one or more chemicals
8. a characteristic that can only be measured or observed when atoms rearrange during a chemical reaction
11. large amount