Atomic weights and isotopic compositions with relative atomic masses [electronic resource]
- [Gaithersburg, Md.] : NIST Physical Measurement Laboratory, 1999-
- This searchable database provides authoriative, complete, and detailed listings of atomic weights and isotopic compositions of elements. The atomic weights are available for elements 1 through 118 and isotopic compositions or abundances are given when appropriate.
- Beginning date
- NIST Physical Measurement Laboratory.
- File Characteristics
- Electronic data.
- Title from web page as viewed October 30, 2013.
- File/Data Type
- Text (HTML) files.
- Mode of access: Internet via the World Wide Web.