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chapter 0005
chapter 5 notes
| Question | Answer |
|---|---|
| Electromagnetic radiation | A form of energy exhibiting wavelike behavior as it travels through space;can be descibed by wavelength, frequency, amplitude, and speed includes visible light, microwaves, X rays, and radio waves. |
| Waveelength | The shortest distance between equivalent points on a continuous wave;is uaually expressed in meters, centimeters, or nanometers. |
| Frequency | The number of waves that pass a given point per second. |
| Amplitude | The height of a wave from the origin to a crest, or from the origin to a trough. |
| Electromagnetic spectrum | Includes all forms of electromagnetic radiation, with the only differences in the types of radiation being their frequencies and wavelengths. |
| Quantum | The minimum amount of energy that can be gained or lost by an atom. |
| Planck's constant | H, which has a value of 6.626 . 10-34 J.s. |
| Photoelectric effect | A phenmenon 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 on mass that carries a quantum of energy. |
| Atomic emission spectrum | A set of frequencies of electromagnetic 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 Planck'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 the atom | An atomic model in which electrons are treated as waves; also called the wave mechanical model of the atom. |
| Atomic orbital | A three-dimensional region around the nucleus of an atom that describes an electron's probable location. |
| Principal quantum number | Which the quantum mechanical model assigns to indicate the relative sizes and energies of atomic orbitals. |
| Pricipal energy level | The major energy levels of an atom. |
| Energy sublevel | The energy levels contained within a principal energy level. |
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