Electrons and Quantum Mechanics - Oakland Schools

Demonstraion 4: Modeling Orbitals.
Spherical balloons can be used to model s-orbitals. Two spherical or oblong balloons
tied together can be used to model p-orbitals.
Materials
6 Balloons (2 each of 3 differentcolors).Tiepairs
of balloons (2 the same color) together. Bunch.
Demonstration 5: Wavelength and Color
To demonstrate the relationship between wavelength and color in the visible range
from red to violet, use a spectrophotometer. Place a piece of white chalk in a
spectrophotometer cell (see Figure 7). Cut (or sandpaper) the chalk at an angle that will
reflect light upward to the student’s eye looking down into the cell holder. Open the slit
width. Rotate the wavelength knob to compare colors and wavelengths.
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