Transition Metals

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Across
  1. 3. what oxidizes them
  2. 4. what are most copper coins
  3. 6. how many transition metals have came after 1900
  4. 8. are they easy or difficult to seperate
  5. 9. what was one of the first metals widely used
  6. 11. what did people begin to add to copper around 3500 B.C.
  7. 12. how many metals have been classified as transition metals
  8. 16. what exists as an element in nature
  9. 17. what is bronze used for
  10. 18. what are minerals that are used for the commercial production
Down
  1. 1. what do most them form compounds with
  2. 2. where do transition metals come from
  3. 5. what color are most transition metals
  4. 7. are transition metals reactive or inactive
  5. 8. what are most transition metals
  6. 10. what do they real ease when they react with water
  7. 13. where do they usually occur together
  8. 14. are they good conductors of heat
  9. 15. what is harder than pure copper