The Periodic Table

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Across
  1. 2. has 125 neutrons and a mass of 209
  2. 5. has a mass of 10
  3. 9. has a mass of 73 and 41 neutrons
  4. 10. the first element on the periodic table
  5. 12. has 36 electrons
  6. 14. has an atomic number of 118
  7. 18. has 32 neutrons and a mass of 59
Down
  1. 1. has a mass of 14
  2. 3. has 42 electrons
  3. 4. has 100 protons
  4. 6. has an atomic number of 8
  5. 7. has 26 protons
  6. 8. has the symbol W
  7. 11. has the symbol Rn
  8. 13. has the symbol Sn
  9. 15. has the symbol Au
  10. 16. has 14 protons and 14 neutrons
  11. 17. has a mass of 209 and 126 neutrons