Ch. 4 and 5 arrangement of electrons

EM Spectrum
scale that shows different types of light waves; range of frequencies & wavelengths
the distance (measured in the direction of propagation) between two points in the same phase in consecutive cycles of a wave
the number of complete wavelengths that pass a point in a given time
the unit of frequency
Photoelectric effect
the emission of electrons from a material when light of certain frequencies shines on the surface of the material
the amount of energy needed to move an electron from one energy level to another
Planck's constant
A fundamental constant, h, that relates the energy of light quanta to their frequency: h = 6.6 X 10^-34 joule·second
A particle of electromagnetic radiation with no mass that carries a quantum of energy
Bohr Model
model of the atom in which electrons move rapidly around the nucleus in paths called orbits
Ground state
a state in which all the electrons in an atom have the lowest possible energies
Excited state
condition of an atom whose electrons are at higher energy levels than the ones they normally occupy
Line emission spectrum
a series of specific wavelengths of emitted light created when the visible portion of light from excited atoms is shined through a prism
Quantum Model of the Atom
an atomic model in which electrons are treated as waves; also called the wave mechanical model of the atom
Heisenberg's Uncertainty Principle
it is impossible to know exactly both the velocity and the position of a particle at the same time
Schrodinger's wave equation
predicts where each electron in an atom will probably be found, i.e. orbitals
Atomic orbital
A three-dimensional region around the nucleus of an atom that describes an electron's probable location
Atomic sublevel