Ionization and Excitation Potential: VIDEO/DVD, The energy transfer between accelerated electrons of different energies and atoms when they collide is presented in this program and related to the quantum theory of atomic structure. First, the ionization potential of three inert gases is measured. When the energy of electrons accelerated through a potential V, eV, is great enough to cause an electron to be ejected from an atom, an ion current is measured in the experimental apparatus. Students can compare their measurement of the ionization potential for the three gases with the correct values (given in the accompanying guide). At lower energies, bombarding electrons can transfer their kinetic energy and temporarily excite atoms. When the electrons lose their energy, the current measured in the apparatus increases because the detector is more efficient at detecting slower electrons. Students measure three discrete excitation potentials for helium, demonstrating the quantum nature of the electron structure of atoms.


			Ionization and Excitation Potential

The energy transfer between accelerated electrons of different energies and atoms when they collide is presented in this program and related to the quantum theory of atomic structure. First, the ionization potential of three inert gases is measured. When the energy of electrons accelerated through a potential V, eV, is great enough to cause an electron to be ejected from an atom, an ion current is measured in the experimental apparatus. Students can compare their measurement of the ionization potential for the three gases with the correct values (given in the accompanying guide). At lower energies, bombarding electrons can transfer their kinetic energy and temporarily excite atoms. When the electrons lose their energy, the current measured in the apparatus increases because the detector is more efficient at detecting slower electrons. Students measure three discrete excitation potentials for helium, demonstrating the quantum nature of the electron structure of atoms. (15 minutes)

ORDER CODE: FFMBVL1081V
VHS VIDEO

ORDER CODE: FFMBVL1081DVD
DVD