Biology Chapter 2

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Across
  1. 2. the attraction of water molecules to each other
  2. 6. smallest part of an ionic compound
  3. 7. the amount of solute in a solvent
  4. 10. what you begin with in a chemical equation
  5. 11. an atom or group of atoms that have an electric charge
  6. 12. what you end with in a chemical equation
  7. 16. a scientific measure of the disorder, randomness, or spread of energy
  8. 18. pure substances made of only one kind of atom
  9. 19. a form of potential energy stored in the bonds that connect atoms and molecules together
  10. 23. a uniform mixture
  11. 24. how much energy is needed to start a reaction
  12. 26. basic building blocks of matter; the smallest particle of an element
  13. 28. pure substance made of two or more chemically combined elements
  14. 30. electrons in the outermost level
  15. 31. change a substance identity
  16. 32. particle consisting of two or more atoms covalently bonded together
  17. 33. a form of energy that can be seen by the naked eye
  18. 34. substance that dissolves in water to form hydrogen ions
  19. 36. he ability to do work
  20. 37. positive charge
  21. 38. substance that dissolves in water to form hydroxide ions
  22. 40. absorbs energy
  23. 41. a substance used to reduce an enzymes activity
  24. 42. is dissolved
Down
  1. 1. process by which particles in a solution are evenly distributed throughout the solvent by Brownian motion alone
  2. 3. tendency that particles have to move around and spread out. Collision occurs between particles.
  3. 4. fewer electrons than protons making it positively charged
  4. 5. neutral charge
  5. 8. negative charge
  6. 9. substance that provides an alternate route to begin a chemical reaction
  7. 13. energy carried by sound waves
  8. 14. dissolves
  9. 15. when water attracts other substances to itself
  10. 17. the total energy stored in an object due to its motion
  11. 20. releases energy
  12. 21. do not change substance identity
  13. 22. electrostatic attraction that forms between atoms when they share or transfer electrons
  14. 25. that total internal energy of a system
  15. 27. molecules that contain carbon covalently bonded to other elements
  16. 29. one substance is broken up into smaller pieces by another substance
  17. 35. a special class of catalyst that occur naturally in living things
  18. 39. extra electrons that are negatively charged