Most abundant atomic mass From NIST database.

Description

This is a periodic table used by ProbMetab::formula2mass to calculate the exact mass of a given molecular formula.

Usage

NIST_relative_atomic_mass

Format

A data.fram containing 118 atomic masses.

Source

http://www.nist.gov/pml/data/comp.cfm.

References

The National Institute of Standards and Technology (NIST) is an agency of the U.S. Department of Commerce.