Across
- 2. Horizontal column
- 4. vertical column
- 8. on the right of the table
- 11. Neutrons+Protons
- 12. that is the same number as the protons
- 14. on the left of the table
- 15. the name of group 17
Down
- 1. the group number indicates this
- 3. group 18 period 3
- 5. group 1 period 4
- 6. the first family name
- 7. elements that are not reactive in the same family
- 9. elements located in the middle of the table
- 10. one or two letters that represent an element
- 13. on the staircase