1. Electron configuration
Bohrs model
Electromagnetic spectrum

2. Atomic Models
Rutherford suggested that electrons revolve around the nucleus in circular or elliptical orbits.
Rutherford’s model could not explain why electrons did not crash into the nucleus.
Bohr’s model of an atom
electrons travel around the nucleus in specific energy levels

3. Atomic Models Rutherford’s model of an atom Bohr’s model of an atom
electrons orbit the nucleus just as planets orbit the sun
Bohr’s model of an atom
electrons travel around the nucleus in specific energy levels

4. Bohrs Model
electrons can be only certain distances from the nucleus.
each distance corresponds to a certain quantity of energy that an electron can have.
An electron that is as close to the nucleus as it can be is in its lowest energy level.
The farther an electron is from the nucleus, the higher the energy level that the electron occupies.
The difference in energy between two energy levels is known as quantum energy.

5. Electron motion Electrons Act Like Both Particles and Waves
The electrons travel only in specific locations around the atom called orbitals
Link

6. Electrons and Light
Einstein proposed that light has properties of waves and particles.
Waves travel with distinct properties and energy.

7. Wave Properties Frequency Wavelength Amplitude
The frequency is the number of waves that pass a stationary point in one second
Wavelength
The wavelength is the distance between two consecutive crest or troughs of a wave.
Amplitude
The height of a wave from top of crest to bottom of trough
Video/pic

8. Electromagnetic Spectrum
The electromagnetic spectrum is the total range of electromagnetic radiation from the longest wavelength to the shortest wavelength
Visible Light
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Most all light travels at x 108 m/s

9. Electromagnetic Spectrum

10. Light Emission Line-emission spectrum:
The wavelength of light emmited when a voltage is applied to a gaseous element
The spectrum is due to the release of energy when an electron moves from a higher orbital to a lower orbit

11. Absorption and Emission Spectra
Video

12. Hydrogen’s Line-Emission Spectrum

13. Light Emission

14. Assignment
Quantum Questions