Across
- 2. the random movement of particles from high to low concentration.
- 5. the process by which particles spread evenly in a medium.
- 6. the energy gained by particles as temperature increases.
- 7. the smallest unit of an element.
- 10. the negatively charged subatomic particle.
- 11. the closely packed, regular structure of solids.
- 12. a pure substance made of two or more elements chemically combined.
- 17. the change of state directly from solid to gas.
- 19. the process where liquid changes to gas at 100 °C.
- 20. the point where a liquid changes to gas.
Down
- 1. the change of state from gas to liquid.
- 3. a mixture of substances not chemically combined.
- 4. the temperature where melting happens in reverse.
- 8. the type of curve showing temperature vs. time when heating.
- 9. the neutral particle found in the nucleus.
- 13. the positively charged subatomic particle.
- 14. the central part of an atom containing protons and neutrons.
- 15. the change of state from solid to liquid at a fixed temperature.
- 16. the state of matter with freely moving particles and no fixed shape.
- 18. the state of matter with particles that vibrate in fixed positions.