Unit II Vocabulary

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Across
  1. 3. a link between two atoms
  2. 6. the center of an atom
  3. 7. the smallest portion of a compound that displays its properties
  4. 10. process that changes, or transforms, one set of chemicals into another set of chemicals
  5. 12. hydrocarbons that contain only single bonds
  6. 13. the average mass of the atom in the element
  7. 14. the process of two different atoms sharing an electron
  8. 16. a negatively charged ion
  9. 18. energy that is needed to get a reaction started
  10. 22. elements or compounds produced by a chemical reaction
  11. 23. the synthesis in living organisms of more complex substances from simpler ones
  12. 24. the basic unit of matter
  13. 25. an atom that has a positive or negative charge
  14. 27. elements or compounds that enter into a chemical reaction
  15. 28. reactant of an enzyme-catalyzed reaction
  16. 29. the connection between two or more different elements
  17. 30. protein catalyst that speeds up the rate of specific biological reactions
  18. 32. a subunit of which nucleic acids are composed
  19. 34. compound made up of carbon, hydrogen, and oxygen atoms
  20. 35. the process of an electron moving from one atom to another
  21. 37. a covalent bond formed between two amino acids
  22. 38. a macromolecule that contains carbon, hydrogen, oxygen, and nitrogen
  23. 40. the attraction between two oppositely charged molecules
Down
  1. 1. electrons contained in the outer shell of an atom
  2. 2. the breaking down in living organisms of more complex substances into simpler ones, with the release of energy
  3. 4. macromolecules containing hydrogen, oxygen, nitrogen, carbon, and phosphorus
  4. 5. a small chemical compound that makes up a polymer
  5. 8. a chart of all the elements in numerical order based on how many protons they have
  6. 9. molecules made up of multiple monomers
  7. 11. substance that speeds up the rate of a chemical reaction
  8. 15. hydrocarbons that contain double or triple carbon
  9. 17. a macromolecule made mostly from carbon and hydrogen atoms
  10. 19. the number of protons in a nucleus
  11. 20. a substance that contains only one type of an atom
  12. 21. the process of many molecules gathering together to create larger molecules
  13. 26. any substance that is composed of two molecules of simple sugars linked to each other
  14. 31. simple sugar molecule
  15. 33. a carbohydrate whose molecules consist of a number of sugar molecules bonded together
  16. 36. a compound with an amino group on one end and a carboxyl group on the other
  17. 39. a compound that contains hydrocarbons