Chemistry

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Across
  1. 2. Proposed the Atomic theory
  2. 4. Silicon and germanium find use in
  3. 5. An example of petrochemical is
  4. 8. The periodic law was formulated by
  5. 10. transmutation of metals to gold
  6. 11. used to sweeten food
  7. 12. An example of explosives is
Down
  1. 1. harmful effects of chemical products
  2. 3. wrote The Skeptical Chymist
  3. 6. Substance used to preserve food
  4. 7. polyester, nylon, terylene are these fibres
  5. 9. chemicals that provide nutrients to crops and increase their production
  6. 13. Named oxygen and hydrogen