Periodic Table

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Across
  1. 3. elements of similar properties will be in the same.
  2. 6. reactive metals in group 2.
  3. 8. an organizational system for elements.
  4. 10. columns on the periodic table.
  5. 12. very that do not occur freely in nature.
  6. 13. brittle, unreflective, and unable to conduct electricity very well.
Down
  1. 1. founder of the periodic table.
  2. 2. compounds containing these are called "salts"
  3. 4. Shiny, ductile and malleable, and conduct electricity and heat.
  4. 5. rows on the periodic table.
  5. 7. many are man-made and half are radioactive
  6. 9. unreactive, full outer shell, "happy elements".
  7. 11. separating transition metals and nonmetals while having properties of both.