The elements, if arranged according to their atomic weights, exhibit an apparent periodicity of properties.

There exists everywhere a medium in things, determined by equilibrium.

I saw in a dream a table where all the elements fell into place as required. Awakening, I immediately wrote it down on a piece of paper.

It is the function of science to discover the existence of a general reign of order in nature and to find the causes governing this order. And this refers in equal measure to the relations of man - social and political - and to the entire universe as a whole.

Elements which are similar as regards their chemical properties have atomic weights which are either of nearly the same value (eg. Pt, Ir, Os) or which increase regularly (eg. K, Ru, Cs).

I have achieved an inner freedom.

The elements, if arranged according to their atomic weights, exhibit an apparent periodicity of properties.