# relative atomic mass

> dimensionless physical quantity: ratio of the average mass of atoms of an element to one unified atomic mass unit

**Wikidata**: [Q41377](https://www.wikidata.org/wiki/Q41377)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Relative_atomic_mass)  
**Source**: https://4ort.xyz/entity/relative-atomic-mass


## References

1. Nuovo soggettario
2. ISO 80000-9:2019 Quantities and units — Part 9: Physical chemistry and molecular physics
3. National Library of Israel