science crossword puzzle

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Across
  1. 4. its a table that has all the elements
  2. 7. it is the 8/0 group in the PERIODIC TABLE
  3. 8. a particle of matter
  4. 10. it has a negative charge
Down
  1. 1. it is the 7th group in the PERIODIC TABLE
  2. 2. it has a positive charge
  3. 3. how dense an object is
  4. 5. it is the first group in the PERIODIC TABLE
  5. 6. how heavy an object is
  6. 9. he amount of space occupied by any three-dimensional solid