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Chemistry Vocab

5-1 & 5-2

QuestionAnswer
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.
Created by: kdrake010