Elements, Compounds, and Mixtures

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Across
  1. 2. forms a chemical element
  2. 5. undergoes change during a reaction
  3. 6. group 18 of the periodic table
  4. 9. row on the periodic table
  5. 10. composition is uniform throughout the mixture
  6. 12. has the properties of both metals and nonmetals
  7. 15. brittle, dull, and poor conductors
  8. 16. positively charged particle
  9. 17. ductile, lustrous, and good conductors
  10. 18. cannot be further broken down by any chemical reaction
Down
  1. 1. substance that is formed from a chemical reaction
  2. 3. column on the periodic table
  3. 4. quantity of matter in an atom of an element
  4. 6. neutral particle
  5. 7. composition is not uniform throughout the mixture
  6. 8. tabular display of the chemical elements
  7. 11. made of identical molecules consisting of atoms of two or more chemical elements
  8. 13. equal protons but different neutrons
  9. 14. length*width*height
  10. 19. negatively charged particle