Elements on the Periodic Table

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Across
  1. 5. I am stable atom and have 40 electrons
  2. 8. My atomic mass is 24.305
  3. 9. There are 13 protons in an atom of this element
  4. 10. I am found in batteries
  5. 12. I am stable atom and have 7 electrons
  6. 13. My atomic mass is 85.4
  7. 15. You put me in the pool to keep it clean
  8. 17. My chemical symbol is Hg
  9. 18. I am used to make pretty jewelry
  10. 19. This gas is part of what we humans exhale
Down
  1. 1. I am the first element on the periodic table
  2. 2. Large amounts of me are found in bananas
  3. 3. I have an atomic number of 88
  4. 4. I have an atomic number of 100
  5. 6. There are 20 protons in an atom of this element
  6. 7. I will be at your birthday party to keep your balloons floating
  7. 9. Watch out, this is poison!
  8. 11. My atomic mass is 131.29
  9. 14. Without this element humans cannot breathe
  10. 16. I make up vibrant bright lights for signs