Chemistry Chapter 3

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Across
  1. 1. electron, an electron that is found in the outermost shell of an atom and that determines the atom's chemical property
  2. 5. the reactant in reactions catalyzed by enzymes
  3. 9. a substance made up of atoms of two or more different elements joined by chemical bonds
  4. 10. a group of atoms that are held together by chemical forces
  5. 11. a class of molecules that includes sugars, starters. And fiber; contains carbon hydrogen and oxygen
  6. 13. The smallest unit of an element that maintains the chemical properties of that element
  7. 15. energy, the minimum amount of energy needed to start a chemical reaction
  8. 17. deoxyribonucleic, acid, that material that contains the instructions for that determines inherited characteristics
  9. 20. adenosine triphosphate, an organic molecule that acts as the main energy source for cell process
  10. 22. A substance that cannot be separated or broken down into simpler substances by chemical means
  11. 23. an atom, radical, or molecule that has gained or lost one or more electrons and has a negative or positive charge
  12. 24. ribonucleic acid, a natural polymer that is present in all living cells and that plays a role in protein synthesis
  13. 26. a fat molecule of a molecules that has similar properties including waxes and steroids
  14. 27. a substance that forms in a chemical reaction
Down
  1. 2. an organic compound that consists of a sugar, a phosphate and a nitrogenous base
  2. 3. a chemical species that donates protons or hydrogen ions and/or accepts electrons
  3. 4. an organic compound that is made of one or more chains of amino acids and that is a principal constituent of all living cells
  4. 6. a special type of homogeneous mixture composed of two or more substances
  5. 7. the tendency of some substances to cling to other substances
  6. 8. the attraction of molecules for other molecules of the same kind
  7. 12. a substance or molecule that participates in chemical reaction
  8. 14. a molecule wither protein or RNA, that acts as a catalyst in biochemical reactions
  9. 16. site, on an enzyme, the site that attaches to a substrate
  10. 18. acid, an organic compound either RNA or DNA whose molecules are made up of one or two chains of nucleotides and carry genetic information
  11. 19. any compound that increases the number of hydroxide ions when dissolved in water
  12. 21. the capacity to do work
  13. 25. acid, a compound of a class of simple organic compounds that contain a carboxyl and an amino group and that combine to form proteins