. And please, please, please write semi-legibly and show your work when warranted.
- 5pts Write a set of quantum numbers that uniquely identifies each of the five 4d orbitals.
- 5pts Among the following atoms, which is likely to be the largest? Na, Mg, K, Ca, Ga _
- 5pts Determine the Russell-Saunders free ion term symbol for the ground state of a d6 ion. Determine the Russell-Saunders term symbol for a diamagnetic excited state (and draw it out so I know which one you choose).
- 10pts The lanthanides are typically found in the +3 oxidation state. Using Slater’s rules, calculate the effective nuclear charge on the 6s and 4f electrons of Cerium. Which is more likely to be lost during the first oxidation step?
- 5pts The periodic variation of first ionization energies is given in the figure below. Account for the trend that is observed in the fourth-period elements (K through Kr).
- 5pts The first ionization potential of sodium is 495.8 kJ/mol, but the second IP is 4562.4 kJ/mol. Explain (written with words- you can use math, but I also want an explanation)
- 10 pts We wish to begin a symmetry-based analysis for the vibrational modes in
chloroform, CHCl3.
(a) What is the point group of CHCl3?
(b) What would you choose to use as a basis set for vibrational (stretching) modes? (no need to perform the analysis- just indicate how you would start)- 10 pts Use VSEPR theory (Lewis dot structures) to predict the shape of the following:
SO32- and CLF3.
Draw the structure you would predict.