Across
- 1. Contains elements that are physically combined and are not altered chemically.
- 4. Contains elements that are in a constant ratio and are chemically bound.
- 6. Positively charged ions.
- 7. An extremely tight ball of particles in the center of an atom.
- 9. A substance that is made of only one kind of atom.
- 11. Matter that has a definite shape and definite volume.
- 13. "Building blocks" that have mass and take up space.
- 14. Negatively charged ions.
- 15. Matter that does not have definite shape or a definite volume.
- 17. Particles of matter with a positive electric charge.
Down
- 2. Have a negative charge and orbit around the nucleus.
- 3. Measures how large an atom is (the total number of protons and neutrons in an atom).
- 5. Atoms that are not electrically balanced.
- 6. The study of the physical materials that make up our world.
- 8. Matter that is a hot gas whose matter is broken into charged particles.
- 10. Matter that does not have a definite shape; instead, it conforms to the shape of its container.
- 12. Similar in size to protons, but they have no charge.
- 16. The smallest piece of a substance that still has all of the properties of the substance.