Chapter 11 Atomic Theory
11.1 Electromagnetic Radiation
Electromagnetic (EM) radiation consists of energy particles
which move as a wave at the speed of light.
EM radiation consists of radio waves, microwaves,
infrared, visible, UV, X-rays, and gamma-rays.
Light from an incandescent light bulb produces a
continuous spectrum of IR and visible light.
11.1 Electromagnetic Radiation - 2
When an element is heated, it emits light at specific
frequencies (not continuous).
How can this be explained?
The Atomic Spectra of Some Elements
11.2,3 The Atom
The electrons in atoms may have different energies.
However, each electron in an atom can have only a
Electron energies are related to their
The larger n, the higher the electron energy.
Electrons in lower energy levels are closer to the nucleus.