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| Electromagnetic Radiation |
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Definition
| Radiant energy that exhibits wave-like behavior & travels through space at the speed of light in a vacuum. |
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| The distance between two consecutive peaks or troughs in a wave. |
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| A "particle" of electromagnetic radiation. |
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Definition
| Certain discreet energy levels of an atom. |
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Definition
| Electron states are described by orbitals. |
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Definition
| A representation of the space occupied by an electron in an atom; the probability distribution for an electron. |
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| Discrete & limited energy levels of an atom. |
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| Divisions of principle energy levels containing the s, p, d, & f blocks. |
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| Pauli Exclusion Principle |
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Definition
| An atomic orbital can hold a maximum of two electrons, & those two electrons must have opposite spins. |
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| Orbital level with the represented electrons. |
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| Orbitals & their categories represented by boxes & arrows signaling opposite spin. |
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| The electrons in the outermost occupied principal quantum level of an atom. |
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| Inner electrons in an atom; one that is not in the outermost (valence) principal quantum level. |
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| A group of 14 elements following lanthanum on the periodic table, in which the 4f orbitals are being filled. |
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| A group of 14 elements following actinium on the periodic table in which the 5f orbitals are filled. |
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| Main-Group Representative Elements |
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Definition
| Elements in group 1-8 on the periodic table. The group number gives the sum of the valence s & p electrons. |
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Definition
| Elements that give up electrons relatively easily & are typically lustrous, malleable, & a good conductor of electricity. |
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| An element that does not exhibit metallic characteristics. Chemically, a typical nonmetal accepts electrons from a metal. |
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| An element that has both metallic & nonmetallic properties. |
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| As the principal energy level increases or decreases, so does the atomic size. |
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| The quantity of energy required to move an electron form a gaseous atom or ion. |
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