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Unit 2: Atom Struct.
Unit 2: Atomic Structure (Periodic Table)
| Term | Definition |
|---|---|
| Atomic Emission Spectrum | The variety of frequencies of electromagnetic radiation (light) seen through a spectroscope that are emitted by electrons as they transition from higher to lower energy levels; unique for each element. |
| Atomic Radius | One-Half of the distance between the center of identical atoms that aren't bonded together |
| Electromagnetic Spectrum | All of the frequencies or wavelengths of electromagnetic radiation |
| Electronegativity | A measure of the ability of an atom in a chemical compound to attract electrons |
| Frequency | The number of cycles or vibrations per unit of time; also the number of waves produced in a given amount of time |
| Hyphen Notation | A way of designing the isotopes of an element using its name (Or symbol), a hyphen, & the mass number (Ex: Uranium-238) |
| Ionic Radius | A measure of the size of an ion of an element in a crystal |
| Ionization Energy | The energy required to remove an electron from an atom or ion |
| Isotope | An atom that has the same # of protons (Or the same atomic #) as other atoms of the same element but that has a different # of neutrons (and thus a different atomic mass) |
| Planck's Constant | A constant value that relates the energy of a photon of light to its frequency |
| Valence Electron | An electron that's found in the outermost shell of an atom & that determines the atom's chemical properties |
| Wavelength | The distance from any point on a wave to an identical point on the next wave |
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