Across
- 3. Are substances that are made of only one type of atom and cannot be broken down into simpler substances by normal chemical or physical means
- 7. Particles with a negative charge
- 8. Is made up of tiny particles
Down
- 1. Anything that takes up space
- 2. Are particles that have a positive charge
- 4. number Equals the number of protons and the number of neutrons
- 5. Have no charge
- 6. Number The number of Protons that equals the number of electrons