`data.frame` of chemical elements from the unimod database.
elementsA `data.frame` with 4 columns (Name, FullName, AvgMass, MonoMass) for the chemical elements.
Taken from the unimod database: http://www.unimod.org/xml/unimod.xml.
It was created as follows:
“` PTMods:::.createDataSets() “`