Periodic table

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Across
  1. 2. Noble gases are inhert this means they are not .................
  2. 5. A noble gas used in signs
  3. 7. The columns on the periodic table
  4. 8. ......... metals are the group 1 elements
  5. 10. The periodic table contains.....
  6. 12. The halogens are in group ......
Down
  1. 1. The rows on the periodic table
  2. 3. An alkali metal that reacts vigorously
  3. 4. An halogen less dense than air
  4. 6. The gases of group 0
  5. 9. Halogens become .......... reactive down the group
  6. 11. Alkali metals become ........... reactive down the group