Periodic table crossword

Edit Answers
1234567891011121314151617181920
Across
  1. 10. The sign for this element is Au
  2. 12. The number of protons an atom has
  3. 15. Everything on the periodic table
  4. 17. Has 7 protons
  5. 18. What classifies an element
  6. 19. On the left side of the periodic table.
  7. 20. Have an electric charge of 0
Down
  1. 1. Smallest group on the periodic table
  2. 2. Has 2 protons
  3. 3. First element on the periodic table
  4. 4. Usually the same number as the protons
  5. 5. Shows how many valence electrons an atom has
  6. 6. Has 6 protons
  7. 7. Has 8 protons
  8. 8. The last energy level has these types of electrons
  9. 9. Shous how many energy levels an atom has
  10. 11. The sign of this element is B
  11. 13. Largest group on the periodic table
  12. 14. The sign for this element is Fe
  13. 16. Has 92 protons