Jennas crossword puzzle

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Across
  1. 3. the rows on the periodic table
  2. 5. where the elements are placed in an order
  3. 6. all one kind of atom and not bonded
  4. 7. the columns on the periodic table
  5. 10. no charge
  6. 11. the number of protons in an element
Down
  1. 1. all are molecules but not all molecules are _____.
  2. 2. negative charge
  3. 4. two or more atoms bonded together
  4. 8. positive charge
  5. 9. smallest unit of matter