Science

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Across
  1. 3. smoke and fog
  2. 5. H2O
  3. 7. negative
  4. 9. the center of atom
  5. 10. neutral
Down
  1. 1. mass and volume
  2. 2. sodium
  3. 3. matter in an object
  4. 4. carbon
  5. 6. positive
  6. 8. H2SO3