English: Plot of density and electronegativity values of the first 100 elements. The geography of the plot broadly matches that of the periodic table. Starting from the top left of the plot, the noble gases are followed by the nonmetal halogens; the unclassified nonmetals; and the metalloids; and then proceeding clockwise: the post-transition metals; the transition (noble) metals; transition metals; actinide and lanthanide metals; and the light metals.