Challenge It! Option #4: Crossword Puzzle

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Across
  1. 2. the components are not chemically bonded together
  2. 3. a thing that is composed of two or more separate elements
  3. 5. the systematic study of the structure and behavior of the physical and natural world through observation, experimentation, and the testing of theories against the evidence obtained
  4. 7. organizes all discovered chemical elements in rows
  5. 10. when atoms of the same type are in a group together
Down
  1. 1. assumed to be the most basic level. The electrons that are formed are free to move between the energy levels
  2. 4. anything that takes up space
  3. 6. A set of symbols showing the composition of a chemical compound
  4. 8. any substance that has a defined composition.
  5. 9. building blocks