periodic table terms

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Across
  1. 5. a part or aspect of something abstract, especially one that is essential or characteristic.
  2. 8. a chemical element, primarily located on the right side of the periodic table
  3. 9. a collection of people or things acting as a unit
  4. 10. an element's tendency to undergo chemical reactions
  5. 11. the predictable patterns in the properties of elements that arise from their arrangement on the periodic table
  6. 12. soft, shiny, and highly reactive metals that each have one electron in their outermost shell.
Down
  1. 1. a table of the chemical elements arranged in order of atomic number, usually in rows,
  2. 2. elements on the periodic table that have properties between those of metals and nonmetals.
  3. 3. a horizontal row of the periodic table
  4. 4. a group of elements found primarily on the left side of the periodic table
  5. 6. how an element reacts with others, a pattern determined by its electron configuration.
  6. 7. a Russian chemist known for formulating the periodic law and creating a version of the periodic table of elements.