periodic table and its trends

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Across
  1. 1. what group are alkali earth metals in
  2. 4. makes stars burn
  3. 5. Zn
  4. 8. Sn
  5. 9. 5th element on the table
  6. 10. on the diagonal line in the table
  7. 11. on the left side of the diagonal line in the table
  8. 12. used in nuclear power plants
  9. 14. first group on the periodic table
Down
  1. 1. the columns on the periodic table
  2. 2. group 18 and has a full valence shell
  3. 3. the rows on the periodic table
  4. 6. on the right side of the diagonal line in the table
  5. 7. 16th element on the periodic table
  6. 13. created periodic table