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Chemistry Vocab
5-1 & 5-2
| Question | Answer |
|---|---|
| Electromagnetic Radiation | A form of energy exhibiting wavelike behavior as it travels through space. |
| Wavelength | The shortest distance between equivalent points on a continuous wave. |
| 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 6.626X10^-34 J's, where J is the symbol for the joule. |
| 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 elctromagnetic radiation with no mass that carries a quantum of energy. |
| Atomic Emission Spectrum | A set of frequencies of electromagnetic waves given off by atoms of an element. |
| Ground State | The lowest allowable evergy state of an atom. |
| De Broglie Quation | Predicts that all moving particales 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. |
| Atomic Orbital | A three-dimensional region around the nucleus of an atom that describes an electon's probable location. |
| Principal Quantum Number | 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 levels contained within a principal energy level. |