Across
- 3. rule that talks about 8s
- 4. first group; metal
- 7. this group can make two different ions; spelled out
- 9. compactness
- 11. distance from center to outside
- 12. repeats across the periodic table
Down
- 1. charged element
- 2. properties of both
- 5. only 2 elements are this state at room temp
- 6. row on the periodic table
- 8. column on the periodic table
- 10. last group; gas