The Periodic Table

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Across
  1. 3. Mendeleev developed a modern version of it
  2. 5. point What increases as you go down Group 0?
  3. 7. It equals the number of outer-shell electrons
  4. 10. They found in the middle of the Periodic Table
  5. 12. Going down a group the number of electron shells...
  6. 13. He discovered the neutron (surname only)
  7. 15. Chemical property of Noble Gases
  8. 16. Noble Gas used to fill party balloons
  9. 17. Mendeleev grouped the elements by...?
  10. 19. It contains protons and neutrons
  11. 22. Maximum number of electrons found in the first shell
  12. 23. They are found on the right of the Periodic Table
Down
  1. 1. Another name for Group 0
  2. 2. How is the outer shell of Noble Gases?
  3. 4. What do metals and non-metals form when they react together?
  4. 6. What did Mendeleev leave in his first version of the Periodic Table?
  5. 8. It tells you the number of protons in an atom
  6. 9. Maximum number of electrons found in the second shell
  7. 11. State of Group 0 elements at room temperature
  8. 14. Newlands developed the Law of...
  9. 18. Sub-atomic particle found in energy shells
  10. 20. They are found on the left of the Periodic Table
  11. 21. In the first version of the Periodic Table the elements were ordered by increasing...