Puzzle 74

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Across
  1. 4. Substance with low pH
  2. 5. Substance made of atoms
  3. 7. Homogeneous mixture
  4. 8. Compound from acid-base reaction
  5. 10. Group of atoms bonded
Down
  1. 1. Process of change
  2. 2. Substance with high pH
  3. 3. Science of substances
  4. 6. Substance of two or more elements
  5. 9. Smallest unit of matter