CHEM 135 Chapter Notes - Chapter 8: Pauli Exclusion Principle, Electron Configuration, Atomic Number
2 Oct 2018
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Document Summary
Periodic property: one that is predictable based on an element"s position within the periodic table. Electron configuration: shows orbitals that electrons occupy. Electron spin and the pauli exclusion principle. Orbital diagram: symbolizes each electron as an arrow in a box that reps orbital. Pauli exclusion principle: no two electrons in an atom can have the same four quantum numbers. They can have 3 of the four in common but the 4th must be different. For multi electron atoms vs solution for just hydrogen is energy ordering of orbitals. In hydrogen, orbital energy only depends on n (3s 3p 3d all have same energy / are degenerate) Multielectron atom: orbitals within a principle level are not degenerate (energy depends on l) For a given value of n: e(s orb. ) Potential energy (e) of 2 charged particles depends on charges q and separation r. For like charges: potential energy (e) is + and decreases as particles get farther apart (as r inc)
