Properties of Elements

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Across
  1. 7. rarely react with anything
  2. 9. an organization of the elements based on chemical properties
  3. 10. anything that has mass and takes up space
  4. 11. a phase of matter that has no definite shape or volume
  5. 13. elements that are not metals or nonmetals
  6. 15. the number assigned to an element, based on the number of protons
  7. 17. bad conductors of heat and electricity
  8. 18. a characteristic of a substance that determines how it interacts with other substances
  9. 20. a substance that produces or speeds up a chemical reaction without being affected itself
Down
  1. 1. created the periodic table of elements
  2. 2. the physical condition of a state of matter (solid, liquid or gas
  3. 3. center of an atom, composed of protons and neutrons
  4. 4. a pure substance made of only one type of atom
  5. 5. a row of elements on the periodic table of elements
  6. 6. a characteristic of a substance that can be changed without changing it chemically (size/shape/density)
  7. 8. a phase of matter that has a definite volume and shape
  8. 10. good conductors of heat and electricity
  9. 12. a type of matter defined by a unique particle
  10. 14. a column of elements on the periodic table of elements
  11. 16. the amount of mass per unit volume
  12. 19. the smallest particle in an element
  13. 21. a phase of matter that has definite volume but no definite shape