Table 2.

Current Content of the Data Repository, with a Few of the Used Sources.

property type	property	sources
physical properties	isotope abundances
	isotope masses	31
	atomic masses	32
	ionization energies
chemical properties	affinities radii	33
	electronegativities
	element densities
discovery	year of discovery
	name and etymology
other	atom type definitions
	2D and 3D coloring schemes