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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