Russian - Scientist | February 8, 1834 - February 2, 1907
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).
Dmitri Mendeleev
ValueSameChemicalElementsEither
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.
LawThoughtResultsPlaceFirst
I have achieved an inner freedom.
FreedomInnerAchieved
No law of nature, however general, has been established all at once; its recognition has always been preceded by many presentiments.
NatureLawRecognitionAlwaysBeen
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.
DiscoveryUnknownExpectExample
No one nor anything can silence me.
SilenceMeAnythingNor
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