Chemistry 401

Intermediate Inorganic Chemistry

University of Rhode Island

Exam 1

October 1, 2010
open book, open notes

1. Find the electron configuration and ground state term symbol for a) F; b) Ca; c) Ga3+; d) Bi; e) Pb2+. Use the rare gas notation for closed shells.


2. Write the Lewis dot structure showing the formal charges, predict the structure including an estimate of all bond angles, and indicate the likely hybrid orbital on the central atom for the following: a) SO3; b) SO32–; c) IF5.


3. What are the expected changes in bond order and bond distance that accompany the following ionization process? Use MO theory to explain your answers.

(a) O2 → O2+ + e

(b) N2 + e → N2

(c) NO → NO+ + e


4. The first ionization potential for Cs is 3.9 eV and the first ionization potential for Au is 9.2 eV, quite different values. Yet the electron configuration for both elements is 6s1. Provide an explanation for the large differences in IP