Across
- 5. The smallest particle of an element
- 7. A rapid, back and forth motion
- 9. How much mass is present per given volume
- 10. Created when two or more atoms of different elements join together
- 11. Particles are closely packed together and vibrate in place; has definite shape and volume
Down
- 1. Particles touch each other and are packed loosely together; has definite volume but NOT definite shape - take the shape of container
- 2. Anything that has mass and takes up space
- 3. A pure substance that cannot be broken down into any other substances; made up of only one type of atom
- 4. Particles in a gas have a lot of thermal energy and are in constant motion; has NO definite volume or shape
- 6. Created when two or more atoms join together
- 8. energy Heat energy; the motion of molecules in a substance