4. Explain why, in general, the electronic energy of an atom or molecule becomes more negative as the MW increases. 5. Use the electronic energies of H(g) and O(g), see Model 1, to estimate the electronic energy of OH(g). Correct this value by taking into account the bond energy of OH, 459kJ/mole. What fraction of the electronic energy of OH is due to the OH bond energy (calculate a numerical value)? 6. Predict which atom in each of the following pairs has the more negative electronic energy. Explain your reasoning. a. Be or Mg b. Sior K c. Ne or Na 7. Predict which molecule in each of the following pairs has the more negative electronic energy. Explain your reasoning. a. I2 or F2 b. CH4 or CF4 c. H2O or H2S Problems 1. a) Find the appropriate ionization values in the Handbook of Chemistry and Physics and calculate Uelec for Li(g). b) Ignore the bond energies and calculate Uelec for LiH(g) and LiF(g). [Hint: see Model 1.] 2. Using grammatically correct English sentences, define the center of mass of a diatomic molecule with atoms of mass m1 and m2