neutron rest mass 

https://doi.org/10.1351/goldbook.N04120
Atomic fundamental physical constant mn=1.6749286(10)×10−27 kg.
Source:
CODATA Bull. 1986, 63, 1 [Terms] [Book]
Citation: 'neutron rest mass' 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.N04120 RIS BibTex EndNote
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Last revised: February 24, 2014