Chemistry Crossword Puzzle

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Across
  1. 2. only metal liquid at room temperature
  2. 4. Dioxide
  3. 5. is the King of Acids
  4. 7. of the strongest bases in chemistry
  5. 8. used to make jewellery more durable
Down
  1. 1. Acid
  2. 3. Hydroxide
  3. 4. present in dry ice
  4. 6. element with atomic number 25