Chemistry

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Across
  1. 2. King of acids
  2. 4. simplest repeating structure of a crystal
  3. 6. Study of Matter
  4. 8. month of Avogadro Number
  5. 9. Lightest element
Down
  1. 1. 17th group elements
  2. 3. Laughing gas
  3. 5. rows on the periodic table
  4. 7. Polymer of isoprene
  5. 8. one of the chalcogens