13. Locate the electronegativity values in Model 1. a. What is the trend in electronegativity going down a group in Model 1? b. Explain the existence of the trend described in part a in terms of atomic structure and Coulombic attraction. c. What is the trend in electronegativity going across a period in Model 1? d.
1 Electron Transport Chain (overview) • The NADH and FADH2, formed during glycolysis, β-oxidation and the TCA cycle, give up their electrons to reduce molecular O2 to H2O. • Electron transfer occurs through a series of protein electron carriers, the final acceptor being O2; the pathway is called as the electron transport chain. Model 1 – The Molecular Structure of Water 1. How many hydrogen atoms are in a molecule of water? 2. How many oxygen atoms are in a molecule of water? 3. What holds the hydrogen atoms to the oxygen atom? 4. The shading around the molecule represents the relative density of electrons shared by the atoms.