C1 Atomic structure and the Periodic table - Periodic Table

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Across
  1. 4. What colour flame does sodium burn with?
  2. 8. Which scientist left gaps for elements that hadn't been discovered?
  3. 9. What metals are found in the group 1?
  4. 10. What do we call columns in the periodic table?
  5. 12. Elements in the same group share the same __________ ?
  6. 14. What colour gas is chlorine?
  7. 15. Elements are arranged in order of their ______ numbers in the periodic table.
  8. 16. What colour gas is fluorine?
  9. 17. What happens to the reactivity of the alkali metals as you go down the group?
Down
  1. 1. What happens to the reactivity of the halogens as you go down group 7?
  2. 2. What type of ions do non-metals form?
  3. 3. The ________ gases are found in group 0.
  4. 5. The nobles gases are very unreactive because they have a _____ outer shell?
  5. 6. What colour flame does lithium burn with?
  6. 7. What do we call all of the elements found in group 7?
  7. 11. What do we call rows in the periodic table?
  8. 12. What colour flame does potassium burn with?
  9. 13. What type of ions do metals form?