lins chem puzzle

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Across
  1. 1. ____ a substance composed of two units
  2. 4. table __chemical properties of the known elements
  3. 7. a substance that consists of atoms
  4. 8. substances you start with
  5. 10. ability to transfer energy
Down
  1. 2. able to be hammered into thin sheets
  2. 3. ___ able to be drawn into thin wires
  3. 5. ability to reflect
  4. 6. mass___the average mass of different forms of elements
  5. 9. the smallest unit of matter