chemistry

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Across
  1. 3. The single acid which dissolves gold
  2. 7. Elements that show the properties of both metals and non metals
  3. 9. What are enzymes
  4. 12. The main constituent of biogas
  5. 13. The elements which behave chemically both as a metal and a non metal
  6. 14. The oldest known organic compound
  7. 15. Which gas is known as the stranger gas
Down
  1. 1. What is the taste of an acid
  2. 2. Hardest form of carbon
  3. 4. Nail polish remover contains
  4. 5. The most mallteable metal
  5. 6. The most electronegative element
  6. 8. Bleaching action of chlorine is by
  7. 10. The heaviest metal known is
  8. 11. Natural rubber is a polymer derived from