Ch 5 Vocab // Chem

Term Definition
Energy level The specific energies an electron in an atom or other spectrum can have
Quantum The amount of energy needed to move an electron from one energy level to another
Quantum mechanical model The modern description, primarily mathematical, of the behavior of electrons in atoms
Atomic orbital A mathmematical expression describing the probability of finding an electron at various locations
Electron configuration The arrangement of electrons of an atom in its ground state into various orbital around the nucleus of atoms
Aufbau principle The rule that electrons occupy the orbitals of lowest energy first
Pauli exclusion principle An atomic orbital may describe be thought of as clockwise or counterclockwise
Hund's rule Electron occupy or orbitals of the same energy in a way that makes the number or electrons with the same spin direction as large as possible
Amplitude The height of a waves crest
Wavelength The distance between adjacent crests of a wave
Hertz The unit of frequency, equal to one cylc per second
Electromagnetic radiation Energy waves that travels in a way vacuum at a speed of 2.998 x 10(8) m/s
Spectrum Wave lengths of visible light that are separated when a beam of light passes through a prism; range of wave length of electromagnetic radiation
Atomic e mission spectrum The pattern formed when light passes through a prism of diffraction grating to separate it into different frequences of light it contains
Planick's constant (N) A number used to calculate the gradient energy (E) absorbed or emitted by a body based on the frequency of radiation
Photoelectric effect The election of electrons by certain metals when they absorb light with a frequency above a threshold frequency
Photon A quantum of light; a discrete bundle of electron magnetic energy that interacts with matter similarly to particles
Ground state The lowest possible energy of an atom described by quantum mechanics
Heisenbergh uncertainty priciple

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