Periodic Table Crossword

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Across
  1. 3. a particle within an atom with a neutral charge
  2. 5. the electrons involved in chemical bonds w/ other elements
  3. 6. the abbreviated letter/s for an element
  4. 9. the name for a column on the periodic table
  5. 10. a particle within an atom with a negative charge
  6. 13. bonds that are created by valence electrons
  7. 14. average amount of protons and neutrons
  8. 16. the name for a row on the periodic table
  9. 17. the electrical attraction between a negative ion & a positive ion
Down
  1. 1. the element with the atomic number '13'
  2. 2. the element with 15 protons
  3. 4. a particle within an atom with a positive charge
  4. 7. the element with the atomic number '1'
  5. 8. the amount of protons & electrons in an element
  6. 11. where all the protons and neutrons are located in an atom
  7. 12. the basic unit of a chemical element
  8. 15. the element with 11 electrons