Periodic Table

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Across
  1. 2. very deadly poison
  2. 5. ____ sign. Plasma is the state of matter
  3. 6. what we breath
  4. 7. in balloons
  5. 10. used in pool water
Down
  1. 1. what trees breath
  2. 3. named after a famous scientist
  3. 4. used in nails or chains
  4. 8. rich people often have it
  5. 9. the tip of a pencil