Periodic Table of Elements

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123456789101112131415161718192021
Across
  1. 1. Vertical columns on the periodic table
  2. 3. The element that is named after the mythological figure Thor
  3. 4. The charge of ions from group I, II, III
  4. 5. An element that smells like garlic when it is heated
  5. 7. The "element of life" that makes up 20% of the mass of living things
  6. 9. The charge of ions from group V, VI, VII
  7. 11. The inventor of the periodic table
  8. 13. The newest element which was added to the periodic table in 2016
  9. 17. Number shown in upper right corner for each element in the periodic table
  10. 19. The most reactive element, used in toothpaste to help prevent cavities
  11. 20. The element that was discovered in the Sun's spectrum before it was found on Earth
  12. 21. Number of rows in the periodic table
Down
  1. 2. Horizontal rows on the periodic table
  2. 6. Number of columns in the periodic table
  3. 8. The most abundant element on earth
  4. 10. The oldest element
  5. 12. Number shown below each element in the periodic table
  6. 14. The property by which the elements are organized in the modern periodic table
  7. 15. The element that can glow in the dark and is used in matches
  8. 16. The property by which the elements are organized in Mendeleev's periodic table
  9. 18. Birthplace of Mendeleev