In this chapter, you will be introduced to electromagnetic radiation and quantum theory. You will learn that radiation has both the properties of waves and the properties of particles and that energy is emitted and absorbed in discrete amounts or quanta. The quantum-mechanical model of the atom is introduced to describe the sequential energy levels in which electrons can be found. Electron configurations of atoms and ions are determined by the distribution of the atom's electrons within the principal energy levels.

In this chapter, you will learn: to describe a wave to identify the major regions of the electromagnetic spectrum to explain what is meant by a quantum of energy to relate the energy of radiation to its frequency to state the main idea in Bohr's model of the atom to describe atomic orbitals in terms of their shape, size, and energy to determine the electron configurations of several elements