Across
- 5. scientists all over the world can understand
- 7. Period 7, Elements 89 - 112
- 8. (2) Number of protons in the nucleus
- 9. Scientist who first created P.T.
- 11. (2) Group 2 elements
- 12. symbols are used because it is easier
- 15. (3) elements arranged on P.T.
Down
- 1. number of Groups on the P.T.
- 2. Inert gasses
- 3. (2) Group 1 elements
- 4. Found in Group 6; Elements 57 - 80
- 6. (2) Groups 3 - 12
- 10. semi-conductors
- 13. number of Periods on the P.T.
- 14. Group 17 elements
- 16. most abundant element in the atmosphere