# monoisotopic mass

> sum of the masses of the atoms in a molecule using the unbound, ground-state, rest mass of the principal (most abundant) isotope for each element instead of the isotopic average mass

**Wikidata**: [Q3297559](https://www.wikidata.org/wiki/Q3297559)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Monoisotopic_mass)  
**Source**: https://4ort.xyz/entity/monoisotopic-mass