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ch.5 vocab.

terms and definations to study

electromagnetic radiation a formof energy that exhibits wavelike behavior as it travels
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 wave's height from the origin to a crest or from the origin to a trough
electromagnetic spectrum encompasses all forms of electromagnetic radiation with the only difference 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 hasa value of 6.626X10^-34 J*s where J is the symbol for the joule
photoelectric effect electrons called photoelectronsare emitted from a metal's surface when light of a certain frequency shines on the surface
atomic emission spectrum the set of frequencies of the electromagnetic waves emitted b y atoms of the element
ground state lowest allowable energy state of an atom
de Broglie equation predicts that all moving particles have wave characteristics.
Heisenberg uncertainty principle states that it is fundamentally impossible to know precisely both the veloocity and position of a particle at the same time.
quantum mechanical model of the atom the atomic mdel in which electrons are treated as waves
atomic orbital three dimensional region around the nucleus that describes the electron's probable location
principle quantum numbers that indicate the relative sizes and energies of atomic orbitals
principal energy levels the atom's energy levels
energy sublevels the level that are contained in 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 excusion principles states that a maximum of two electrons may occcupy a single atomic orbital but only if the electrons have opposite signs
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 the electrons in the atom's outermost orbitals.
electron dot structure represents the atomic nuleus and inner-level electrons.
Created by: rosesword