Physical Chemistry
2nd Edition
ISBN: 9781133958437
Author: Ball, David W. (david Warren), BAER, Tomas
Publisher: Wadsworth Cengage Learning,
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Question
Chapter 15, Problem 15.34E
Interpretation Introduction
Interpretation:
The values of
Concept introduction:
A term symbol describes the orbital, spin and total angular momenta of an electronic state. The symbol
In case of diatomic molecules, the term symbol is given by the formula as shown below.
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Students have asked these similar questions
although we associate
Pz
2. Now we will move on to diatomic molecules. In atoms all p-orbitals are equivalent
with m/= 0, and px py with m/= ±1. In diatomic
molecules these orbitals are in fact separated, with pz associated with o orbitals
along the internuclear axis and px py associated with л orbitals (m/= ±1). In
determining electron configurations we do indeed separate them: N₂ (KK¹ 0₂²).
and O2 (KKogu ng *2).
4
a. Two excited states of N₂ are associated with Tu
transitions.
Tg and
og
→ ou*
i.
Draw the MO energy level scheme (p-orbitals only) for the N₂
ground state and for these two excited states.
ii.
Obtain the term symbols for the two excited states and order
them according to Hund's rules.
iii. Write the wave functions for each of the terms obtained in ii)
above.
iv. Pick one wave function from each excited state and show it
obeys the Pauli Principle.
Three of the term symbols that correspond to a nd3 electron configuration are 2P, 2F, and 4P. Rank these in terms of increasing energy.
For each of the statements below, indicate whether it is true or false and explain your reasoning. (1
sentence )
1/ It takes more energy to ionize an electron from the 2s orbital than an electron from the 2p orbital
in the Li2+ ion.
2/ The electron affinity of the Ne atom is larger than the electron affinity of the F atom.
3/ K* has a larger radius than Ar.
4/ For a diatomic molecule, in which the internuclear axis is the z-axis, the 3dz? orbital cannot mix
with the 2px orbital.
5/ The internuclear distance of O2 increases as it takes an additional electron to become O2".
Chapter 15 Solutions
Physical Chemistry
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