Chemistry

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Across
  1. 4. plumbum in statement
  2. 5. F in periodic table
  3. 6. we breathe
  4. 8. SO4
  5. 10. hydrogen peroxide
  6. 11. acid and alkaline
Down
  1. 1. safety for your eyes
  2. 2. proton number and neutron number
  3. 3. chemotherapy
  4. 7. who is gonna score in chemistry?
  5. 9. potential of hydrogen