a) What is the largest wavelength of
light that will produce photoelectrons from lead?
b) What is the largest wavelength of light that
will produce photoelectrons from lithium?
c) Which metal (lead or lithium) held its
electrons stronger? (Hint: Which metal required a
higher energy of light to
create photoelectron emission)
d) Select the LOW INTENSITY button to change
the light to HIGH INTENSITY. Describe
what happened to the light source in
your animation.
e) What setting must you change in this
simulation to change the current recorded by
the ammeter on the bottom of this animation?
f) When you decrease the wavelength of light,
you decrease, or increase the frequency. Underline
a)
What happens to the size
of the scattering angle when the alpha particle comes closer to
the nucleus?
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3.
Rutherford
scattering applet
- ©
1995-2007 by
Michael W. Davidson and The Florida State
University
a) What
do the yellow dots in the thin gold foil represent?
______________________________________________________________________________________
INSTRUCTIONS:
Use the yellow drop down menu on
the top left to change the energy of the
alpha particle.
b) Which energy on the drop down menu produces the
least scattering angle?
_____________________________________________________________________________
4. Atomic
Spectra
- University of Oregon
INSTRUCTIONS:
*** Change the applet
from ABSORPTION to EMISSION
Click on each element in
Group 1 to see its spectral lines.
(Group 1 is the first vertical
column)
Questions
a) Which element in group one has the
fewest spectral lines ? (Don't count Fr)
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b) Which element in group one produces the most
spectral lines?
_______________________________________________________________________
c) Which element in the last group produces
the most "low energy" spectral lines?
_______________________________________________________________________
5.
Water in a
Microwave
a) How does an increase in power effect the
motion of the water molecule in this demo?
________________________________________________________________________
b) Based on what you learned from this java
applet, how does a microwave heat up food?
________________________________________________________________________
6.
One-dimensional
one-atom gas
a) What happens to the speed of the gas
molecule when you compress the gas?
________________________________________________________________________
b) What happens to the temperature?
________________________________________________________________________
7.
Nuclear
Chain Reaction
a) Why does splitting one of the atoms cause all
the other atoms to split.
________________________________________________________________________
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