electron rest mass

https://doi.org/10.1351/goldbook.E02008
Atomic fundamental physical constant used as @A00504@ of mass, \(m_{\text{e}} = 9.109\ 3897\ (54)\times 10^{-31}\ \text{kg}\).
Source:
CODATA Bull., 1986, 63, 1. [Terms] [Book]