### Section 1 the Basic Tools of Quantum Mechanics

Physics Literature

Excerpt: Chapter 1. Quantum Mechanics Describes Matter in Terms of Wave functions and Energy Levels. Physical Measurements are Described in Terms of Operators Acting on Wave functions. Operators, Wave functions, and the Schr”dinger Equation The trends in chemical and physical properties of the elements described beautifully in the periodic table and the ability of early spectroscopists to fit atomic line spectra by simple mathematical formulas and to interpret atomic ele...