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Chapter 5 Vocabulary


Electromagnetic radiation is a form of energy that exhibits wavelike behavior as it travels through space
Wavelength is the shortest distance between equivalent points on a continuous wave
Frequency is the number of waves that pass a given point per second
Amplitude is the wave's height from the origin to a crest, or from the origin to a trough
Electromagnetic spetrum also called the EM spectrum, encompasses all forms of electromagnetic radiation, with only differences in the types of radiation being their frquencies and wavelengths
Quantum is the minimum amount of energy that can be gained or lost by an atom
Planck's constant has a value of 6.626x10^-34, where J is the symbol for the joule, the SI unit of energy
Photoelectric effect electrons, called photoelectrons, are emitted from a metal's surface when light of a certain frequency shines on the surface
Photon is a particle of electromagnetic radiation with no mass that carries a quantum of energy
Atomic emission spectrum is a set of frequencies of the electromagnetic waves emitted by atoms of the element
Ground state the lowest allowable energy state of an atom
de Brogile equation predicts that all moving particles have wave characteristics
Heisenburg principle states that it is fundamentally impossible to know precisely both the velocity and position of a particle at the same time
Quantum mechanical model of the atom the atomic model in which electrons are treated as waves
atomic orbital the three-dimensional region around the nucleus
Principal quantum numbers indicate the relative sizes and energies of atomic orbitals
Principal energy levels specifies the atoms majority energy level
Energy sublevels a part of the principal energy levels
Electron configuration the arrangement of electrons in an atom
Aufbau principle states that each electron occupies the lowest energy orbital available
Pauli exclusion principle states that a maximum of two electrons may occupy a single atomic orbital, but only if electrons have opposite spins
Hund's rule states that single electrons with the same spin must occupy each equal-energy orbital before additional electrons with opposite spins can occupy the same orbitals
Valence electrons are defined as electrons in the atoms outermost orbitals, generally those oritals associated with the atom's highest principle energy level
Electron-dot structure consists of elements symbol, which represents the atomic nucleus and inner-level electrons surrounded by dots representing the atom's valence electrons
Created by: mitchellvontia