Chemistry 401

Intermediate Inorganic Chemistry

University of Rhode Island

Exam 2

November 3, 2000
opne notes, open book

1. Label each of the orbitals shown as σ, π, δ, σ*, π*, or δ*.

a) b) c) d)

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2. Construct a molecular orbital energy diagram for the CN molecule. What is the bond order? How many unpaired spins are there? Assume hybridization.

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3. In Exam 1 you were asked to predict the trend in the density of the metals from Sc to Zn using mass and Z*. The nature of the bonding in these metals also is important. How does the bonding influence the density? How does the metallic bond energy vary across these series of metals?

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4. Determine if the following semiconductors are n-type, p-type, or neither: a) Al doped in Si; b) S doped into Ge; c) GaAs. Briefly explain your reasoning in each case.

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5. Give the point group for each of the following: a) PCl3; b) PCl5; c) [PtCl4]2–; d) O2; e) SF6.

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