Periodic Table

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Across
  1. 2. what you put in balloons that make them float
  2. 4. first element
  3. 6. column
  4. 7. symbol K
  5. 9. element 5,14,32,33,51,52
  6. 10. group 17
  7. 11. the horizontal rows of the periodic table
  8. 13. group 1
Down
  1. 1. group 2
  2. 3. group 3-12
  3. 5. any of the series of fifteen metallic elements from actinium (atomic number 89) to lawrencium (atomic number 103) in the periodic table.
  4. 7. symbol Pr and element 59
  5. 8. symbol Fe
  6. 12. group 18
  7. 14. element 57-71