### By the end of this unit students will be able to:

- Describe how the following people contributed to the atomic theory: Democritus, Dalton, Thomson, Rutherford, Bohr, and Schroedinger. Be able to compare and contrast each model of the atom with its immediate predecessor.
- Identify the wavelength, amplitude, crest, trough, speed, and frequency of a wave.
- Identify the type of wave based on its wavelength.
- Describe the seven types of electromagnetic waves in terms of use, energy, frequency, and wavelength.
- Draw a Bohr model for any element with an atomic number less than 19.
- Compare and contrast an electron’s ground and excited state.
- Describe the Aufbau Principle, Hund’s Rule, and the Pauli Exclusion Principle and how they relate to electron configurations.
- Write the shorthand and extended electron configuration for any element.
- Describe where a particular electron may be located based on its electron configuration.
- Draw an orbital filling diagram for any element.
- Use the speed of light formula to solve for wavelength or frequency.
- Use the wave energy formula to solve for frequency and energy.
- Use the Bohr Model (for hydrogen) to determine an electron’s wavelength.

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