chemistry

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Across
  1. 4. the line in the middle of the two equation
  2. 5. left of the equation
  3. 7. not equal
  4. 8. tiny numbers
  5. 9. to be equal
Down
  1. 1. big numbers you multiply
  2. 2. numbers and letters
  3. 3. right of the equation
  4. 6. matter cannot be destroyed