The Spiral Periodic Table

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Across
  1. 5. The last name of the creator of the spiral periodic table
  2. 7. One of the two grouped together, begins with an 'A'
  3. 9. Group at the left side of the spiral periodic table
  4. 10. Direction in which atomic number and mass increase continuously
  5. 11. Name of the magazine Theodor was appointed editor for
Down
  1. 1. What the spiral periodic table fails to not accommodate for
  2. 2. The animal the periodic table was nicknamed after
  3. 3. The issue that Benfey found with the standard periodic table
  4. 4. Element at the center of the spiral
  5. 6. Last name of the person who assisted with the periodic table
  6. 8. Model that inspired the spiral periodic table