Crossword puzzle

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Across
  1. 3. A subatomic partical with a negative charge
  2. 6. Two or more atoms bonded together
  3. 7. the smallest unit of matter
  4. 9. A subatomic partical with a positive charge
  5. 10. pure substances made of only one type of atom on the periodic table
Down
  1. 1. a repeating pattern of atoms or molecules bonded together
  2. 2. A subatomic partical with a neutral charge
  3. 4. A substance that is the same throughout and is made of only 1 type of substance
  4. 5. anything with mass and volume
  5. 8. two ore more atoms or molecules are combined (NOT bonded)