atomic structure and periodic table

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Across
  1. 2. an element in group 4 period 3
  2. 4. an element with a symbol of P
  3. 6. the element with a symbol of Fe
  4. 8. an element with a symbol of Ca
  5. 9. an element with a symbol of K
  6. 11. subatomic particle with neutral charge
  7. 12. an element with an atomic number of 12
  8. 15. an element in group 4 period 6
  9. 16. the column in the periodic table represents ________
  10. 17. an element with a symbol of Na
  11. 18. the positively charged subatomic particle
Down
  1. 1. the smallest subatomic particle
  2. 3. an element with an atomic number of 13
  3. 5. an element with a symbol of C
  4. 7. an element in group 7 period 5
  5. 8. the electrons located outside are very light weighted, they call are electron _________
  6. 10. protons and neutrons are located in ________
  7. 13. the electron has a __________ charge
  8. 14. the row in the periodic table represents ________