Science crossword

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Across
  1. 3. a state of matter; very slow moving particles
  2. 6. a thing that consists of more than one element
  3. 7. A physical property
  4. 9. the basic unit of a chemical element
  5. 10. Subatomic particle with positive charge
Down
  1. 1. a state of matter; somewhat fast moving particles
  2. 2. form of matter in which the electrons wander freely among the nucleus of the atom
  3. 4. Subatomic particle with negative charge
  4. 5. Subatomic particle with neutral charge
  5. 8. a state of matter; very fast moving particles