Periodic Table

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Across
  1. 1. Group 2A Elements
  2. 3. Group 6A Elements
  3. 4. Group 1A elements
  4. 6. Group 7A Elements
  5. 7. The game that Mendeleev based his periodic table off
  6. 8. The element discovered in 1879 that helped prove the usefulness of Mendeleev's Periodic Table
  7. 12. Family Group 3A Elements
  8. 13. Russian chemists and teacher that created the start to the modern periodic table
  9. 14. All element that are in this state at room temperature are nonmetals
  10. 17. Group 5A Elements
  11. 22. Good conductors of heat and electricity
  12. 23. The number of elements that scientists had identified by 1750
  13. 24. The patter of repeating properties is called this
  14. 27. The modern Periodic Table is arranged in order of increasing what?
  15. 28. Have properties that fall between metals and nonmetals
Down
  1. 2. Defined as one twelfth the mass of a carbon-12 atom, gives the neutrons and the protons each a weight of 1
  2. 5. An arrangement of elements in columns, based on a set of properties that repeat from row to row
  3. 9. The Rows on the Periodic Table are called this
  4. 10. Poor conductors of heat and electricity
  5. 11. Group 4A Elements
  6. 14. The unknown element that Mendeleev named eka-aluminum
  7. 15. The Columns on the Periodic Table are called this
  8. 16. An electron that is in the highest occupied energy level
  9. 18. Group 8A Elements
  10. 19. When the same element has different numbers of neutrons
  11. 20. A French chemist that categorized the elements as metals, nonmetals, gases, and earths
  12. 21. The side that the most reactive nonmetals are on
  13. 25. The side that the most reactive metals are on
  14. 26. The state of MOST metals at room temperature