Chemistry

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Across
  1. 3. hydrogen + oxygen
  2. 4. a fluid
  3. 5. if one can float or not
  4. 8. deep ringing sound
Down
  1. 1. stretch like a cable
  2. 2. An element that has the properties of metals and non metals
  3. 6. mixture of metals
  4. 7. what everything is made of