C1 Revision

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Across
  1. 2. The centre of the atom containing protons and neutrons
  2. 4. The columns in the periodic table
  3. 5. A subatomic particle with a negative charge
  4. 7. What happens to reactivity as you go down Group 7
  5. 11. The total number of protons and neutrons
  6. 14. The part of the atom where electrons are found
  7. 18. The arrangement of electrons in shells
  8. 20. The rows in the periodic table
  9. 24. An atom that has gained or lost electrons
  10. 25. Found on the right side of the periodic table
  11. 27. The charge on an ion that has lost electrons
  12. 28. Discovered the electron and made the plum pudding model
  13. 30. The number of protons in an atom
Down
  1. 1. Name of the table of elements
  2. 3. A substance made of only one type of atom
  3. 6. The charge on an ion that has gained electrons
  4. 8. Scientist who arranged the first useful periodic table
  5. 9. Discovered the neutron
  6. 10. Discovered the nucleus with the gold foil experiment
  7. 12. A subatomic particle with no charge
  8. 13. Group 1 metals that react with water
  9. 15. Suggested electrons move in fixed orbits
  10. 16. Increases as you go down Group 1
  11. 17. Group 0 gases that are unreactive
  12. 19. Found on the left side of the periodic table
  13. 21. Scientist who first described atoms as solid spheres
  14. 22. A subatomic particle with a positive charge
  15. 23. Noble gases have this type of outer shell
  16. 26. Atoms of the same element with different numbers of neutrons
  17. 29. Group 7 non-metals that get less reactive down the group