Physical science cross word

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Across
  1. 2. a one or two letter representation of an element.
  2. 5. the change from the gaseous to the liquid state.
  3. 7. a liquid's resistance to flowing
  4. 9. the outter electrons.
Down
  1. 1. the mass/velocity.
  2. 2. this is a bond with 2 non-metals.
  3. 3. atom with same protons different neutrons.
  4. 4. the change in state from a solid directly to a gas.
  5. 6. can be pulled into a wire
  6. 8. a change making 1 or 2 new substances.