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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
quantum the minimun amount of energy that can be gained or lost by an atom
Planck's constant which has a value of 6.626x10-34 J.s , where J is the synbol 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 electromagnetic 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 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 ia 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 electron'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 energy levels contained within a principal energy level
Created by: ldenton10