Periodic

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Across
  1. 3. H----- Balloons
  2. 4. What is the name for the chemical symbol 'Fr'?
  3. 5. What element had the atomic weight 1.008
  4. 10. What is the newest 'official' discovered element added to the Periodic table?
  5. 12. What is the first element on the 5th line of the periodic table?
  6. 14. What element was discovered in 1981?
  7. 16. What is the name for the chemical symbol 'Hg'?
  8. 17. What chemical has the atomic number 5?
Down
  1. 1. What is the first 'official' element discovered?
  2. 2. Last numbered element on the periodic table?
  3. 6. Which element did P. and M. Curie observe?
  4. 7. What is the name for the chemical symbol 'Fi'
  5. 8. What is the name for the chemical symbol 'Hf'?
  6. 9. What element was created by a bombardment of americium with alpha particles?
  7. 11. What element did A. Arfwedson first observe?
  8. 13. What is the name for the chemical symbol 'C'?
  9. 15. What does the 'o' stand for in H2o?