STUDY GUIDE EXAM 1 spring 2011

STUDY GUIDE EXAM 1 spring 2011 - STUDY GUIDE EXAM #1 SPRING...

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STUDY GUIDE EXAM #1 SPRING 2011 Chapter 1: unifying themes (6), usually one question, often on cell theory (two parts) Chapter 2. Chemistry (handout) **Know about atomic number and atomic mass – what it means and how it is symbolized; given this info be able to determine # of protons, # neutrons, #electrons **Knowing the #electrons should enable you to know the **VALENCE** (number of electrons needed to fill the outermost shell=number of covalent bonds the element must form to be stable) **Valence is an important concept and there will be a least a couple of questions that require that you understand this concept – because the chemical behavior of atoms depends on the number of bonds it needs to form; you should also know the valence of the 4 major elements in living things (H, O, N, C) **Chemical bonds: STRONG BONDS (covalent and ionic – what is the difference?) What is a covalent bond? What is the difference between polar and nonpolar covalent bonds and how does it affect the behavior of the molecules formed? **WEAK BONDS (hydrogen and hydrophobic) **discussion question: What is a hydrogen bond? Use water as an example to show a hydrogen bond. Draw a picture - use an arrow to show the position of the hydrogen bond. **polarity is an important concept because it affects the behavior of molecules – there will be
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STUDY GUIDE EXAM 1 spring 2011 - STUDY GUIDE EXAM #1 SPRING...

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