Mystery of Metals & Non-Metals

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Across
  1. 2. Chemical symbol Au
  2. 3. Easily broken
  3. 5. Shiny in appearance (property)
  4. 7. Hammered into thin sheets
  5. 8. Starts with O
Down
  1. 1. Neither a conductor, nor lustrous
  2. 4. Does not allow electricity to flow
  3. 6. Chemical symbol B