Across
- 2. substances cannot be simpler substances
- 7. rows going sideways on the periodic table
- 8. positive particles
- 9. rows going down on the periodic table
- 10. group 18 on periodic table
- 11. relating to atoms
- 13. basic unit of a chemical element
- 14. center of atom
- 16. atom with a net electric charge
- 17. negatively charged
- 18. using ions
Down
- 1. positively charged ion
- 3. anything that isn't a metal
- 4. material that is usually solid, conductor
- 5. model made by niels bohr
- 6. table of organized elements
- 12. neutral particles
- 15. model made my ernest rutherford