Periodic Table Crossword

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12345678910111213141516171819
Across
  1. 7. makes up batteries
  2. 10. has 171 neutrons
  3. 11. noble gas with the lowest atomic number
  4. 13. the only halogen with a three letter symbol
  5. 15. alkali metal with the highest atomic number
  6. 16. second lowest atomic number of the metalloids
  7. 18. the only metalloid with a singular letter symbol
  8. 19. has 12 protons
Down
  1. 1. has a atomic mass of 204.4
  2. 2. the only symbol with the 23rd letter
  3. 3. the transition metal with the lowest atomic number
  4. 4. the only symbol with the 25th letter
  5. 5. has a atomic mass of 138.9
  6. 6. atomic mass of 195.1
  7. 8. the only actinide with a singular letter symbol
  8. 9. the atomic number of 8
  9. 12. has 30 neutrons
  10. 14. the highest atomic number
  11. 17. symbol of Pb