CHEM 11H Lecture Notes - Lecture 15: Pauli Exclusion Principle

• School: Santa Clara University
• Department: Chemistry and Biochemistry
• Course: CHEM 11H
• Professor: Tan

Document Summary

Cannot be derived from schr dinger equation, is a completely different quantum phenomenon. Spin: an inherent property of an electron. All electrons have the same magnitude of spin. Orientation is quantized, either up (ms = + ) or down (ms = - Note: figure is pictorial representation only, electrons are not physically spinning! Shapes: s orbitals and radial probability probability of e- is present within boundary. Plot probability density (2), orbitals drawn such that 90% Radial probability: [(r)]2 x surface area at r. Radial probability function: total probability of finding e- within spherical shell at r. 2s & 3s have nodes (0% probability of finding e-) Ms intrinsic property of electron, (spin up or down, + or - ) Pauli exclusion principle: no 2 electron in the same atom can have the same set of 4 quantum numbers (n, l, mi, ms)