The elements, if arranged according to their atomic weights, exhibit an apparent periodicity of properties.
Work, look for peace and calm in work: you will find it nowhere else.
The magnitude of the atomic weight determines the character of the element, just as the magnitude of the molecule determines the character of a compound body.
The establishment of a law, moreover, does not take place when the first thought of it takes form, or even when its significance is recognised, but only when it has been confirmed by the results of the experiment.
Certain characteristic properties of elements can be foretold from their atomic weights.
The most all penetrating spirit before which will open the possibility of tilting not tables, but planets, is the spirit of free human inquiry. Believe only in that.
Pleasures flit by - they are only for yourself; work leaves a mark of long-lasting joy, work is for others.
I want you to have this feeling too - it is my moral responsibility to help you achieve this inner freedom.
No law of nature, however general, has been established all at once; its recognition has always been preceded by many presentiments.
We could live at the present day without a Plato, but a double number of Newtons is required to discover the secrets of nature, and to bring life into harmony with the laws of nature.
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).