Dmitri Mendeleev
Dmitri Mendeleev
Dmitri Ivanovich Mendeleev; 8 February 1834 – 2 February 1907 O.S. 27 January 1834 – 20 January 1907) was a Russian chemist and inventor. He formulated the Periodic Law, created a farsighted version of the periodic table of elements, and used it to correct the properties of some already discovered elements and also to predict the properties of eight elements yet to be discovered...
NationalityRussian
ProfessionScientist
Date of Birth8 February 1834
CityTobolsk, Russia
CountryRussian Federation
Pleasures flit by - they are only for yourself; work leaves a mark of long-lasting joy, work is for others.
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.
I want you to have this feeling too - it is my moral responsibility to help you achieve this inner freedom.
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.
Work, look for peace and calm in work: You will find it nowhere else. Pleasures flit by -- they are only for yourself; work leaves a mark of long-lasting joy, work is for others.
The edifice of science not only requires material, but also a plan. Without the material, the plan alone is but a castle in the air-a mere possibility; whilst the material without a plan is but useless matter.
I have achieved an inner freedom.
The elements which are the most widely diffused have small atomic weights.
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).
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.
There is nothing in this world that I fear to say.
We must expect the discovery of many as yet unknown elements-for example, elements analogous to aluminum and silicon- whose atomic weight would be between 65 and 75.
No one nor anything can silence me.
No law of nature, however general, has been established all at once; its recognition has always been preceded by many presentiments.