chemistry

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Across
  1. 4. you can`t change it back
  2. 7. stick together
  3. 8. two or more different atoms chemically combined
Down
  1. 1. you can change it back
  2. 2. slip and slide past each other
  3. 3. no fixed volume
  4. 5. the 1 on periodic table
  5. 6. 13 on periodic table