Ch 2 Nature of Molecules

Objectives

• 1. Know the structure of an atom.

  2. Differentiate between atomic number and atomic mass.

  3. Understand the importance of and the differences between ions and isotopes of an element.

  4. Know what determines the chemical identity of a given element.

  5. Understand how molecules undergo reduction and oxidation reactions.

  6. Water spontaneously dissociates into H+ and OH– ions and is the basis of most buffering systems.

  7. Understand what controls the combination of elements into molecules.

  8. Know the characteristics of the various bonds found in living organisms.

  9. Explain why water is the essence of life as we know it.

  10. Describe pH in biological and mathematical terms. Know some values for household solutions.