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CRChem1Ch4Vocabulary terms

continuous spectrum emission of a continuous range of frequencies of electromagnetic radiation
electromagnetic radiation form of energy that behaves like a wave as it travels through space
electromagnetic spectrum all forms of electromagnetic radiation
excited state atom has more potential energy than at the ground state
frequency number of waves that pass a given point in a certain amount of time, usually 1 second
ground state lowest energy state of an atom
line emission spectrum series of specific wavelengths and frequencies of light created when the visible portion of light from excited atoms is shone through a prism
photoelectric effect metal giving off electrons when a light is shone on it
quantum minimum quantity of energy that can be gained or lost by an atom
wavelength distance between corresponding points on adjacent waves
angular momentum quantum number tells the shape of the orbital
Heisenberg Uncertainty Principle it is impossible to know both the position AND velocity of an electron (or other small particle)at the same time
magnetic quantum number tells the orientation of the orbital around the nucleus
orbital 3D area around the nucleus where an electron is likely to be found
principal quantum number tells the main energy level that an electron is in
quantum numbers tell the properties of atomic orbitals and the electrons within them
quantum theory mathematical description of the wave properties of electrons and other very small particles
spin quantum number tells the spin of an electron in an orbital; can have two values: +1/2 or -1/2
Aufbau Principle an electron occupies the lowest energy level that can receive it
electron configuration the arrangement of electrons in an atom
highest occupied level the electron-containing main energy level that has the highest principal quantum number
Hund's Rule orbitals of equal energy must each be occupied by one electron before any of the orbitals receive a second electron
inner shell electrons electrons that are not in the highest occupied level
noble gases the group 18 elements (He, Ne, Ar, Kr, Xe, and Rn); have an octet of electrons
noble gas configuration an outer main energy level fully occupied, in most cases, by eight electrons
Pauli Exclusion Principle no two electrons in the same atom can have the same set of four quantum numbers
photon particle of electromagnetic radiation that has no mass and carries a quantum of energy
Created by: CRMissK



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