Periodic table

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Across
  1. 5. Subatomic particle with a negative charge
  2. 7. They share properties of metals and nonmetals
  3. 9. The majority of elements; they are on the left side
  4. 12. Number of protons in an atom
  5. 13. Name of the columns on the periodic table
  6. 15. Subatomic particle with a positive charge
Down
  1. 1. Combination of two or more different elements
  2. 2. Name of the horizontal rows on the periodic table
  3. 3. Metals on the first group
  4. 4. There are 118 of these
  5. 6. Elements on the right side
  6. 8. Biggest family of metals
  7. 10. Smallest piece of matter
  8. 11. Subatomic particle with no charge
  9. 14. Group 18