Chemistry 1201 Review/Preview
Chapter Six Review Guide
Dr. Saundra McGuire
Spring 2007
Electronic Structure of Atoms
I.
The Wave Nature of Light
A.
The electromagnetic radiation spectrum illustrates the range and regions of
electromagnetic radiation.
The spectrum ranges from the highenergy
gamma
region to the low energy radio wave region and beyond.
The visible
region of the
spectrum ranges from violet (400 nm) to red (750 nm).
B.
The relationship between the frequency of electromagnetic radiation, the
wavelength of the radiation, and the speed of light is given by the following
relationship:
νλ =
c
where c is the speed of light (3 X 10
8
m/sec);
λ
is the wavelength of the radiation;
and
ν
is the frequency.
(Do sample exercises 6.1 and 6.2 (without looking at the solution!) for practice
using this equation.)
II.
Quantized Energy and Photons
Max Planck theorized that energy can be emitted or absorbed by atoms only in
discrete chunks, called quanta.
One quantum is the smallest amount of energy
that can be transferred.
The relationship between the energy of a single quantum
and the frequency is given by the following relationship:
E = h
ν
where h = Planck's constant, 6.626 X 10
34
Js
(See Exercises on page 223 for practice.)
III.
Line Spectra and the Bohr Model
A.
Emission spectra (or line spectra)  produced when an excited atom emits
energy of
specific wavelengths due to the electrons falling from higher to lower
energy levels.
(See Figure 6.12.)
B.
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 Summer '09
 Staff
 Atom, Electron, Photon, Atomic orbital

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