C2 Revision

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Across
  1. 3. how many protons does magnesium have
  2. 5. two or more elements that are chemically bonded together
  3. 10. how many electrons in the first shell
  4. 11. how many protons does nitrogen have
  5. 13. how many electrons in the second shell
  6. 15. the smallest number next to an element on the periodic table
  7. 16. the number of protons is equal to the number of
  8. 19. the nucleus contains protons and
Down
  1. 1. the big number taken away from the small number
  2. 2. table of elements
  3. 4. an example of an element
  4. 6. how many protons does potassium have
  5. 7. an example of a compound
  6. 8. how many hydrogens 2H20
  7. 9. two or more elements or compounds that are not chemically bonded together
  8. 12. made up of only one type of atom
  9. 14. salt is made of chlorine and
  10. 17. the middle of an atom
  11. 18. how many oxygen molecule in carbon monoxide