Across
- 2. positive charged sub atomic particle
- 4. 2 or more atoms bonded
- 6. pure substance of one type of atom
- 7. number of protons
- 11. 2 or more substances combined
- 12. smallest part of a element
- 13. pure substance everywhere
Down
- 1. 2 or more elements bonded
- 3. not consistent throughout
- 5. ratio of average mass
- 8. number of protons + neutrons
- 9. negative charged sub atomic particle
- 10. neutral charged sub atomic particle