chemistry

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Across
  1. 5. the smallest particle of a chemical element that can exist
  2. 7. a chemical reaction in which an acid and a bare interact with the formation of a salt
Down
  1. 1. a substance that takes part in and undergoes change during a reaction
  2. 2. change irreversible chemical reaction of new substance
  3. 3. the process of burning something
  4. 4. change changing forms of a chemical substance
  5. 6. resulted substance in a result of a chemical reaction