Ecosyste.ms: Packages

An open API service providing package, version and dependency metadata of many open source software ecosystems and registries.

crates.io "isotope" keyword

mendeleev 0.8.0
List of chemical elements, their isotopes, and their properties
8 versions - Latest release: about 1 year ago - 2 dependent packages - 1 dependent repositories - 3.87 thousand downloads total - 2 stars on GitLab.com - 1 maintainer
Nuclide 0.2.1
Database and simple modeling of all known nuclides
12 versions - Latest release: 9 months ago - 4.5 thousand downloads total - 18 stars on GitHub - 1 maintainer