Chapter 2 crossword - Renee Hintz

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Across
  1. 3. a special class of catalyst
  2. 5. pure substances made of only one kind of atom
  3. 8. organic compounds made of carbons, hydrogens, and oxygens
  4. 12. nonpolar molecules
  5. 13. a change in a substance that does not change the identity of the substance
  6. 15. stored energy that holds two atoms together
  7. 16. a class of organic compounds that serve as the building blocks for the information storage molecules DNA and RNA
  8. 18. the attraction between like particles within polar substances
Down
  1. 1. a measurement of the average speed of the particles within a substance
  2. 2. the basic building blocks of matter
  3. 4. a substance that provides an alternate route from reactants to products
  4. 5. the immaterial stuff that gets things done
  5. 6. the tendency of energy to disperse
  6. 7. a change in a substance that results in one or more new substances being formed that have different physical and chemical properties
  7. 9. molecules that have a central carbon bonded to four groups
  8. 10. a pure substance made from two or more elements that are chemically combined
  9. 11. a substance that is present before a chemical reaction and takes part in it
  10. 14. the attraction of particles in one substance for particles in a different substance
  11. 17. the substances formed during a chemical reaction
  12. 19. simple carbohydrates