Across
- 1. Substance formed when different atoms are chemically joined
- 7. Smallest piece of an element
- 8. Negatively charged particle that orbits the nucleus
- 9. Person who studies and learns about the natural world
- 11. State of matter that flows and takes the shape of a container
- 13. Positively charged particle inside the nucleus
- 15. Tiny piece of matter
Down
- 2. Combination of substances that keep their own properties
- 3. Pure substance made of one kind of atom
- 4. Center of an atom holding protons and neutrons
- 5. Anything that takes up space and has mass
- 6. Two or more atoms bonded together
- 10. Particle with no charge inside the nucleus
- 12. State of matter with a fixed shape
- 14. State of matter that spreads out to fill any space