Periodic Table

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Across
  1. 2. The type of atom including Silicon, Germanium, and Arsenic tsymbol
  2. 6. Number of protons in an atom
  3. 9. The only element with an atomic number that repeats three times
  4. 10. Bottom number in each square of the periodic table
  5. 12. The element with the highest possible atomic number
  6. 15. The variety of metals that are better at conducting heat and electricity
  7. 17. The name for group seventeen of the periodic table
  8. 18. An element with two valence electrons in the sixth period
  9. 20. The letter representation of every element on the periodic table
Down
  1. 1. Group three, three valence electrons
  2. 3. The number of groups in the periodic table
  3. 4. The name for the upper right section of the periodic table
  4. 5. The block that contains both Lithium and Radium
  5. 7. The only element in the F block with a one-letter chemical symbol
  6. 8. The elements found in the rightmost period of the periodic table
  7. 11. The horizontal organization of the periodic table
  8. 13. The element that makes up most of Earth's atmosphere
  9. 14. The type of electron found in the outermost energy ring of an atom
  10. 16. The only element with an atomic number over ninety-eight that starts with a C
  11. 19. Noble gas in period one