Term: normalization https://doi.org/10.1351/goldbook.NT07086 Definition: A mathematical procedure which ensures that the integral of the square of modulus of a wave-function over all space equals 1. The constant required to ensure that a wave-function is normalized is termed the normalization constant. Source: PAC, 1999, 71, 1919. 'Glossary of terms used in theoretical organic chemistry' on page 1956 (https://doi.org/10.1351/pac199971101919) Citation: 'normalization' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.NT07086 License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.