Diamond

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Across
  1. 5. The arrangement of carbon atoms in diamond (11 letters)
  2. 7. Diamond is useful for these types of tools (7 letters)
Down
  1. 1. The type of bonds that join carbon atoms in diamond (8 letters)
  2. 2. electrons: does not have these, which prevents it from conducting electricity (9 letters)
  3. 3. has a very high _________ point (7 letters)
  4. 4. A key property of diamond due to its rigid network of carbon atoms (4 letters)
  5. 6. carbon atom in diamond is joined to this many other carbon atoms (4 letters)