Periodic Table of Elements

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Across
  1. 1. Has 2 protons and a full outer shell.
  2. 4. A noble gas used in brightly coloured advertising signs.
  3. 6. A non-metal with 5 protons.
  4. 7. Has 15 electrons.
  5. 8. Makes up 78% of the Earth's air and is found above P in the periodic table.
  6. 9. The smallest halogen.
  7. 10. An alkali earth metal found in the second period.
  8. 12. A halogen that is found in the third period.
  9. 15. Located directly below Oxygen on the periodic table.
  10. 16. Combines with Chlorine to form salt.
Down
  1. 1. The smallest atom.
  2. 2. Can create diamonds when joined together.
  3. 3. Has 4 electrons, 2 in the inner shell and 2 in the outer shell.
  4. 5. Combines with 2 hydrogen atoms to make water.
  5. 11. A metal used to make soft drink cans.
  6. 13. A highly reactive alkali metal that is used in long life batteries.
  7. 14. A noble gas that has 18 electrons.