Across
- 2. the elements are arranged by
- 4. inactive gases
- 6. how many elements are on the periodic table
- 12. Elements in the middle of the periodic table are the metals
- 14. what element makes jewerly
- 15. nonmetals tend to form
- 16. atomic number is the number of
- 17. horizontal rows are called
- 18. most active nonmetal
- 19. group 1 metals
- 20. the group number shows what
Down
- 1. three through twelve on the periodic tables group is called
- 3. groups how many groups are there on the periodic table
- 5. why does the periodic table have groups
- 7. the sum of the protons and neutrons is called the
- 8. metals tend to form these types of ions
- 9. what is colbat used for
- 10. who invented the periodic table
- 11. the vertical columns are called
- 13. what is the most important element