Another Look at the Atoms:
1. Distinguish between a continuous spectrum and a line spectrum.
2. State the main idea in Bohr's model of the atom.
line spectrum quantum number ground state excited state matter wave uncertainty principle
As we stated in the last lesson, atoms can only absorb energy in quantized packets according to plank's constant. As that quantized packet of energy is released by the atom a photon is created.
This single frequency of light is called a line spectrum. More specifically, a line spectrum contains only certain frequencies of light which can be seen by passing the emitted light through a prism. Look at the example below.
Niels Bohr used the information in the line spectrum to develop his model of the atom.
Bohr believed that energy must be quantized to get to different energy orbitals around the atom. He called the energy levels quantums.
Heisenberg's Uncertainty Principle:
Bohr's planetary model came under some uncertainty and much scrutiny. Heisenberg displayed that is is impossible to know where an electron is at any one particular point. You can only be relatively sure where it is not.
Last modified: October 04, 2002