Across
- 3. group 1
- 5. symbol As
- 9. the section below the periodic table
- 10. decreases as you go down a group
- 11. upper left corner in an element
- 14. The most reactive nonmetal
- 15. period 18
- 16. the size of an ion
- 17. The staircase down the periodic table
- 18. The densest element
Down
- 1. group 17
- 2. The first element
- 4. d-block
- 6. the ability to attract electrons
- 7. symbol Au
- 8. The most reactive metal
- 12. The only liquid metal
- 13. symbol Ag