CHEM 1040 Lecture Notes - Lecture 2: Spin Quantum Number, Pauli Exclusion Principle, Magnetic Quantum Number

• School: University of Guelph
• Department: Chemistry
• Course: CHEM 1040
• Professor: Richard Delaat

Document Summary

7. 4 quantum mechanics (mathematically describes the wave properties of extremely small particles of matter, also called wave mechanics) only in force-free environments: de broglie relation: light and matter have both wave (frequency and wavelength) and particle properties. Applies: bohr"s theory of orbitals is replaced by quantum mechanics. Principle quantum number(n)- principal determinant of energy of: s orbital- spherical. Electrons 99% likely to be found in 99% contour. 2s has two rings of probability whereas 1s is just a circle: p orbital- two lobes centered on nucleus. There are three d orbital one on each of the x, y and z axes: 5 d orbitals with complicated shapes. Shapes and energies of orbitals pg a-5: 2. Defines shell of electron (k-1, l-2, m-3, n-(cid:885) (cid:524) 3,g-(cid:886) (cid:524) electron- values of o. 5 or +o. 5 . Spin creates magnetic fields around electrons with north and south poles. and l |value is integers from -l to l: 3.