Physical and Chemical Properties

3. the scientific study of the composition, structure, and the properties of matter and the changes that matter undergoes
4. a combination of two or more substances that are not chemically combined
8. a substance made of atoms of two or more different elements that are chemically combined
9. the temperature and pressure at which a solid becomes a liquid.
10. hey change that occurs when A substance changes composition by forming one or more new substances.
11. the ratio of the mass of a substance to the volume of a substance
12. the temperature at which a liquid becomes a gas
13. the smallest unit of the substance that keeps all the physical and chemical properties of that substance
14. a change of matter from one form to another without a change and the chemical properties
16. the smallest unit of an element that maintains the properties of the element

1. anything that has mass and takes up space.
2. A sample of matter, either a single element or a single compound, that has definite chemical and physical properties
5. the ability of a substance to combine chemically with another substance
6. a combination of chemical symbols and numbers to represent a substance
7. the ability of a substance to react in the presence of oxygen and burn when exposed to a flame
15. a substance that cannot be separated or broken down into simpler substances by chemical means