Periodic Table Crossword

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Across
  1. 2. My Atomic Mass is 6.941
  2. 3. My symbol is "Na"
  3. 6. I was discovered by Daniel Rutherford
  4. 7. My nickname is "The Element of Life
  5. 9. My atomic mass is 18.998
  6. 11. I am used to fill up balloons
  7. 12. I was discovered in 1755
  8. 13. The first element in the periodic table
  9. 14. My symbol is "B"
Down
  1. 1. I am the 3rd most abundant element in the Earth's crust
  2. 3. My Atomic number is 14
  3. 4. I was discovered in 1898
  4. 5. I am used to make spacecraft, missiles, aircraft
  5. 8. I am what you breathe
  6. 10. My Atomic number is 15