Chapter 2

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Across
  1. 3. bonds when electrons are completely transferred from one atom to another
  2. 4. a positively charge subatomic particle
  3. 5. two or more atoms of the same or different elements chemically combine
  4. 9. the stuff in the earth
  5. 10. the building block of an element
  6. 12. many sugars
  7. 16. double sugars
  8. 19. the process of spontaneous atomic decay
  9. 22. a negatively charged subatomic particle
  10. 23. functional proteins that act as biological catalysts
  11. 24. bonds where molecules share electrons
Down
  1. 1. negatively charged ions
  2. 2. a large diverse group of organic compounds
  3. 5. energy directly involved in moving matter
  4. 6. changes that do not alter the basic nature of a substance
  5. 7. building blocks of protein
  6. 8. energy that travels in waves
  7. 11. simple sugars
  8. 13. compounds that lack carbon and tend to be simpler,smaller molecules
  9. 14. massless,does not take up space and can only be measured by its effects on matter
  10. 15. pH 14-8
  11. 17. pH 6-0
  12. 18. an uncharged subatomic particle
  13. 20. the structure of DNA
  14. 21. changes that do alter the composition of a substance