The United Nations announced 2019 as the International Year of the Periodic Table of the Chemical Elements to highlight its first publication in 1869. The periodic table as we know it today was first ...

A live stage of the XXXVI All-Russian Mendeleev Competition, the Mendeleev School Conference, has started at Tomsk ...

On 17 February 1869, Russian chemist Dmitri Mendeleev jotted down the symbols for the chemical elements, putting them in order according to their atomic weights and inventing the periodic table. He ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American The scientist who systematized all the known ...

More than a thousand different versions of the periodic table have been created since Dmitri Mendeleev drew the first 150 years ago – but why is one version more familiar to us than practically every ...

Dmitri Ivanovich Mendeleev was not the first to recognize the periodicity of the chemical elements or even to construct a primitive periodic table. He did go much further than his peers, however, in ...

A century and a half ago, a Russian chemistry professor published a classification of all the known elements, organized by atomic weight. Today, the system that he created for his students — plus some ...

At the middle of the 19th century, 63 chemical elements were known to science. Before Mendeleev’s discovery, attempts at arranging them in some logical way were made by Johann Doebereiner (1829), ...