Download Review - ND

Rutherford Experiment
In 1911, Rutherford and his colleagues performed
an experiment using thin gold foil and a beam of
alpha particles. One of the observations was that
some alpha particles scattered back from the foil
towards the source.
i) Describe Rutherford's model of the atom.
ii) How does this model explain the experimental
observation that some of the alpha particles are
scattered back from the foil?
iii) Describe two problems associated with
electron orbits in Rutherford's model that were
overcome by Bohr's quantized orbits concept.
7/8/2017
1
Lasers
A pulsed laser emits light in a series of short
pulses, each having a duration of 25.0 ms. The
average power of each pulse is 5.00 mW, and
the wavelength of the light is 633 nm. Find:
a) the energy of each pulse
b) the number of photons in each pulse.
7/8/2017
2
Binding Energy
• What is the equation for the binding
energy of 14-carbon?
• State the steps used in calculating the
binding energy per nucleon?