Periodic Table Crossword

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Across
  1. 5. The element with the symbol "Si"
  2. 7. The element with the atomic number 3
  3. 10. The halogen in the second period
  4. 11. The element symbolized as "K"
  5. 13. The number of valence electrons in carbon
  6. 14. The noble gas with the atomic number 10
Down
  1. 1. The metal found in bananas
  2. 2. The number of neutrons in most oxygen atoms
  3. 3. The number of protons in magnesium
  4. 4. The atomic number of sulfur
  5. 6. The element with the highest atomic number among the first 20 elements
  6. 8. The second element of the periodic table
  7. 9. The atomic number of phosphorus
  8. 12. The atomic number of nitrogen