Of the possibility that the harmonious order of the elements is a matter of chance, professor of chemistry John Cleveland Cothran observed: “The post - prediction discovery of all of the elements whose existence [Mendeleyev] predicted, and their possession of almost exactly the properties he predicted for them, effectively removed any such possibility.
एम. डायरक यांनी असे म्हटले: “शेवटी असे म्हणावे लागते की देव हा अतिशय उच्च प्रतीचा गणिततज्ज्ञ आहे.