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