Google celebrates with its now famous "doodle" the German chemist Julius Lothar Meyer, 190 years after his birth.
He is about to end up run over, his mother saves himChemist, author, professor and, above all, scientist who independently discovered the "law of periodicity" of chemical elements: today, 19 August, Google celebrates with its now famous "doodle" the German Julius Lothar Meyer, 190 years after his birth (19 August 1830 - 11 April 1895).
Meyer was one of two scientists who worked on compiling the early versions of the periodic table: once he started his medical studies, in fact, Julius concentrated on physiological chemistry. He graduated from Würzburg in 1854 and received his doctorate in 1858, then starting his career as a science professor.
In 1864, he published the treatise "Die modernen Theorien der Chemie" (Modern Chemical Theory), fundamental because it included a rudimentary system for the organization of 28 elements based on atomic weight. This was the beginning of the idea of a periodic table.
But Russian chemist Dmitri Mendeleev, who was developing similar ideas on his own, was also working on this authentic milestone of science.
In 1869 Mendeleev in fact published a periodic table of all known elements and, a few months later and independently, Meyer also published a revised and expanded version of his 1864 table, very similar to that of Mendeleev, together with a document which graphically shows the periodicity of the elements as a function of atomic weight.
©chemistrygod/Shutterstock
In an article of 1870 Meyer graphically demonstrated the relationship between atomic volume and atomic weight provided the demonstration of the "law of periodicity" which describes the cyclic patterns between elements.
In 1882, both Meyer and Mendeleev received the Davy Medal from the Royal Society, in recognition of their work on the law of periodicity.
©Wikipedia
Elements that, without your noticing, are part of your daily life.
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