Chemistry Crossword

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Across
  1. 3. A type of metal extraction by heat
  2. 6. Its chemical formula is Cu5FeS4
  3. 9. Shows and classifies all 118 known types of atoms(elements)
  4. 11. The symbol of this element is N
  5. 12. Group number in periodic table is 1 and period in periodic table is 4
  6. 13. Is a common metal that can only be extractedusing electrolysis
  7. 15. The most common method of obtaining metals
  8. 17. Are chemical substances that make up rocks
  9. 18. The alloy that is used for silver coins
  10. 19. Contains 20% chronium and 10% nickel to stop it from rusting
  11. 21. The least common group in the periodic table
  12. 25. A scale that measures the amount of pure gold in jewellery
Down
  1. 1. Are lustrous, malleable and ductile
  2. 2. Is the closest we get to pure iron in everyday materials
  3. 4. The main component of steel
  4. 5. Metal most abundant in Australian silver coins, common to both brass and bronze
  5. 7. Superheated liquids in the earths crust
  6. 8. Cracks in the rocks where minerals are formed
  7. 10. Cannot be used as pure elements, are too soft to be made into anything useful
  8. 14. The building blocks from which everything else is made
  9. 16. Formed by sediments deposited on the sea floor
  10. 20. Another type of metal extraction by heat
  11. 22. A metal combined with another element
  12. 23. Pure Iron with small amounts of carbon added
  13. 24. Is a rock that has sufficient metal making it worthwhile to mine