Across
- 2. Same atomic number but different atomic mass.
- 3. Process by which a gas turns into a liquid.
- 4. Process by which a liquid changes into a gas.
- 6. Number of particles in a nucleus; sum of protons and neutrons.
- 9. The state of matter with neither definite shape nor volume.
- 11. Smallest unit of an element that retains the properties of that element.
- 13. Subatomic particle with a negative charge.
- 15. The state of matter with a definite shape and volume.
- 16. The state of matter with a definite volume but no definite shape.
- 17. The theory that describes the way particles move in matter.
- 19. Positively charged particle in an atom's nucleus.
- 20. Change from a liquid to a solid.
Down
- 1. A solid that forms and settles out of a liquid mixture.
- 5. The state of matter that is similar to gas but has charged particles.
- 7. Smallest particle of a compound that retains its chemical properties.
- 8. The phase change from gas directly to solid.
- 10. A type of matter made of only one type of atom.
- 12. Change from a solid to a liquid.
- 14. An atom's central region, made up of protons and neutrons.
- 18. A substance composed of two or more elements chemically combined.