Across
- 3. : A substance made up of two or more elements chemically combined in fixed proportions
- 5. : Gas changing into liquid
- 9. : A combination of two or more substances that are not chemically bonded and can be separated by physical means
- 13. : A reaction that releases heat energy to the surroundings
- 16. : Negatively charged particle that follows an orbit of a level around a nucleus
- 17. : Smallest unit of matter
- 18. : The temperature at which a liquid changes to a gas
- 20. : A state of matter that has a fixed shape and volume
Down
- 1. : Rapid vaporization of a liquid
- 2. : Process of liquid turning into gas
- 4. : A measure of how hot or cold a substance is
- 6. : An instrument used to measure temperature
- 7. : Liquid turning into solid
- 8. : Positively charged particle in the nucleus
- 10. PARTICLE THEORY : The theory that all matter is made up of tiny particle which are in constant motion and that the energy arrangement of these particles determine the state of matter
- 11. : Neutral particle found in the nucleus
- 12. : A substance that contains only one type of atom and cannot be broken down into anything simpler by chemical means.
- 14. : A state of matter that has a definite volume but no fixed shape
- 15. : Solid turning into liquid
- 19. : A state of matter that has no fixed shape or volume