chem terms

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amplitude the height of a wave from the origin to the crest  
electron configuration the arrangement of electrons around the nucleous of an atom in its ground state  
atomic emission spectrum the pattern of frequencies obtained by passing light emmited by atoms of an element in a gasous state through a prism  
energy level a region around the nucleous of an atom where an electron is likely to be moving  
electromagnetic radiation a series of energy waves that travel in a vacuum at 3.0 x 10 to the 10th  
ground state the lowest energy level occupied by an elecron when an atom is in its most stable energy state  
frequency the number of wave cycles that pass a given point per unit of time  
wavelength the distance between two adjacent crests of a wave  
hertz the SI unit of frequency, equal to one cycle per second  
photoelctric effect electrons are ejected by certain metals when they absorb light with a frequency  
photon a quantum of light  
quantum the amount of energy needed to move an electron level to the next higher one  
atomic radius 1/2 the distace between the nuclei in a molecule consisting of identical atoms  
ionization energy the energy required to remove an electron from a gasous atom  
electronegativity the tendancy for an atom to attract electrons to itself when it is chemically combined with another element  
period a horizontal row of elements in the periodic table  
group a vertical column of elements in the periodic table  

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