periodic table/elements puzzle

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Across
  1. 5. number 100 on the periodic table
  2. 7. number 118 on the periodic table
  3. 9. which table houses all the elements
  4. 12. number 22 on the periodic table
  5. 13. number 28 on the periodic table
  6. 16. which subatomic particle has a negative charge
  7. 19. number 74 on the periodic table
  8. 20. How many electrons could be held in the 2nd energy level
  9. 21. number 104 on the periodic table
Down
  1. 1. what type of substance is antimony
  2. 2. which side of the periodic table is the most reactive
  3. 3. how many electrons are in an atom of boron
  4. 4. which subatomic particle has a neutral charge
  5. 6. number 11 on the periodic table
  6. 8. number 79 on the periodic table
  7. 9. which subatomic particle has a positive charge
  8. 10. which number on the periodic table has a mass of 35
  9. 11. How many neutrons are in an atom of Chlorine?
  10. 14. number 36 on the periodic table
  11. 15. which number on the periodic table has a mass of 289
  12. 17. which side of the periodic table is the least reactive
  13. 18. number 2 on the periodic table