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chapter 005
chapter 5 notes
| Question | Answer |
|---|---|
| Electromagnetic radiation | A form of energy exhibiting wavelike behavior as it travels through space; can be described by wavelength, frequency, amplitude, and speed and includes visible light, microwaves, X rays, and radio waves. |
| wavelength | The shortest distance between equivalent points on a continuous wave; is usually expressed in meters, centimeters, or nanometers. |
| frequency | The number of waves that pass a givin point per second. |
| amplitude | The height of a wave from the origin to a crest, or from the origin to a trough. |
| quantum | The minimum amount of energy that can be gained or lost by an atom. |
| Plank's constant | h, which has a value of 6.626 X 10 to the negative 34 power J*s, where J is the symbol for the joule. |
| electromagnetic spectrum | Includes all forms of electromagnetic radiation, with the only differences in the types of radiation being their frequencies and wavelengths. |
| photoelectric effect | A phenomenon in which photoelectrons are emitted from a metal's surface when light of a certain frequency shines on the surface. |
| photon | A particle of electromagnetic radiation with no mass that carries a quantum of energy. |
| atomic emission spectrum | A set of frequencies of elctromagnetic waves given off by atoms of an element; consists of a series of fine lines of individual colors. |
| ground state | The lowest allowable energy state of an atom. |
| de Broglie equation | Predicts that all moving particles have wave characteristics and relates each particle's wavelength to its frequency, its mass, and Plank's constant. |
| Heisenberg uncertainty principle | States that it is not possible to know precisely both the velocity and the position of a particle at the same time. |
| quantum mechanical model of an atom | An atomic model in which electrons are treated as waves; also called the wave mechanical model of the atom. |
| atomic orbital | A three-deminsional region around the nucleus of an atom that describes an electrons probable location. |
| principal quantum number | n, which the quantum mechanical model assigns to indicate the relative sizes and energies of atomic orbitals. |
| principal energy level | The major energy levels of an atom. |
| energy sublevel | The energy levels contained within a principle energy level. |
Created by:
haley2011
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