Metals, non-metals and metaloids

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Across
  1. 3. a list of app the known 118 elements
  2. 5. shatters when hit
  3. 6. shines when polished or freshly cut
  4. 9. the main metal in an alloy
  5. 10. a mixture of a base metal and small amounts of other elements
Down
  1. 1. a scale for measuring the purity of gold
  2. 2. an alloy of iron and carbon
  3. 4. different forms of carbon
  4. 7. able to be stretched into wires
  5. 8. able to be hammered into new shapes