Quiz 2 material

[Robert Zellmer]

Quiz 2 - Week of Feb. 25: Chapters 6, 7, 8 and 9.1-9.3


Chapter 6:

Nature of light, understand what wavelength and frequency are and how the
are related, electromagnetic spectrum (rough idea of the wavelengths and
frequencies of various regions and the end limits for the visible region),
relationship between energy, frequency and wavelength, line spectra and
Bohr model, energy states of the Hydrogen atom, Rydberg eqn., wave nature
of matter, uncertainty principle, quantum mechanics (orbitals and
quantum numbers), representations of orbitals (probability density,
radial probability functions, how many peaks and nodes in these functions,
contour representations - shapes of the orbitals), electron configurations,
orbital diagrams, electron-dot (Lewis) symbols, exceptions to electron
config.

You should be able do to any homework problem in ch 6.


Sections 7.1-7.6:

Understand Zeff (effective nuclear charge - don't worry about Slater's Rules
for Zeff in the closer look box on p. 253), atom and ion sizes, IE, EA,
and their trends in the periodic table, be able to explain these
trends, be able to explain exceptions (mostly seen for groups 2A and 5A).
Be able to explain general properties of nonmetals, metalloids and metals.

We skipped Sections 7.7-7.8.

You should be able do to any homework problems 7.1-7.68, 7.83-7.100,
7.103, 7.105-7.106, 7.112

If you are using the 11th edition do homework problems 7.1-7.68,
7.83-7.102, 7.105-7.106, 7.111

If you are using the 10th edition do homework problems 7.1-7.64,
7.79-7.99, 7.104-7.105, 7.110


Chapter 8:

Lewis symbols and "octet" (noble-gas) rule, ionic bonding, lattice
energy (be able to calculate it but also understand the relationship
between LE, charge, size of ions and melting point), Born-Haber cycle,
electron-config. for ions (which electrons come out first), covalent
bonding, electronegativity(EN) and bond polarity, dipoles and diple
moments, differentiating between ionic and covalent bonding (see notes
for how to do this based on differences in EN), Lewis structures
(including resonance structures and exceptions to octet rule),
strengths of covalent bonds (bond enthalpy calculations), relationship
between bond strength and bond enthalpy and bond length and bond order
(as given in the notes).

You should be able do to any homework problem in ch 8.


Sections 9.1-9.3:

Electron-domain geometries and molecular geometries (shapes).  Know the
shapes and bond angles (whether exact or approximate).  Remember, the ED
geometry includes all electron pairs (lone pairs and bonding pairs, i.e.
atoms) and determines the overall molecular geometry and bond angles.
However, the molecular geom. is described by the atoms only (does not
inlcude lone pair electrons).  When a question simply states "what is
the shape or geometry of a molecule it is asking about the molecular
geometry (not the ED geometry).  Use VSEPR theory to predict ED and
molecular geometries.

Polarity of molecules.  This depends on the shape of the molecule and
what is attached to the molecule (atoms and lone pairs).  For instance,
a tetrahedral molecular geometry (also the ED geometry) can give nonpolar
only if all four entities around the central atom are identical to each
other (such as CH4, CCl4, etc.).

Sections 9.4-9.7:

These will <b>NOT</b> be on the quiz.  I was reluctant to leave this
off the quiz but the above is enough.  I'm relying on you to realize
you need to go through these sections before the exam since they will
be on the exam (at least parts of them - specifics will appear on the
class web page at the "Exams" link).

You should be able do to homework problems 9.1-9.4, 9.6, 9.11-9.46,
9.87-9.98, 9.102, 9.109-9.110.

For those of you using the 11th edition the quiz covers sections 9.1-9.3
and homework problems 9.1-9.4, 9.11-9.38, 9.75-9.84, 9.96-9.97

For those of you using the 10th edition the quiz covers sections 9.1-9.3
and homework problems 9.1-9.4, 9.11-9.38, 9.75-9.84, 9.96-97


Dr. Zellmer