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Chemistry
Unit 2
| Term | Definition |
|---|---|
| Excited State | a state in which an atom has more energy than it does at its ground state |
| Ground State | the lowest energy state of a quantized system |
| Ionization Energy | the energy required to remove an electron from an atom or ion |
| Electronegativity | the ability of an atom in a chemical compound to attract electrons |
| Electromagnetic Spectrum | all of the frequencies or wavelengths of electromagnetic radiation Avogadro's Number 6.02x1023 the number of atoms or molecules in 1 mole |
| Avogadro's Number | 6.02x1023 the number of atoms or molecules in 1 mole |
| Electron Affinity | the energy change when an electron is acquired by a neutral atom |
| Mole | the SI base unit to measure the amount of the substance |
| Photon | a unit or quantum of light; particle of electromagnetic radiation |
| Orbital | a region in an atom where there is a high probability of finding electrons |
| Electron Configuration | the arrangement of electrons in an atom |
| Pauli Exclusion Principle | the principle that states that two particles of a certain class cannot be in exactly the same energy state |
| Hund's Rule | singly occupied with one electron before any one orbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin; the number of unpaired electrons is the maximum possible and these unpaired electrons bonds between atoms |
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