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), ...

In this video excerpt from NOVA's "Hunting the Elements," New York Times technology columnist David Pogue explores how the periodic table of elements took shape. Learn how the periodic table developed ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. On Feb. 17, 1869, Russian chemist Dmitri Mendeleev published his first attempt to sort the ...

The periodic table of elements, or Mendeleev’s table, was created in 1869 by Russian chemist Dmitri Mendeleev. This table organizes all known chemical elements by their atomic number, or the number of ...

The periodic table of the elements, present in virtually every high school and college chemistry classroom, was conceptualized in large part by the 19th-century Russian chemist Dmitrii Mendeleev.

DMITRI Mendeleev had a problem. As a professor at the University of St Petersburg in Russia, he was supposed to teach chemistry to students, and to guide him in that task he had arranged a contract ...

At first glance, the system of chemical elements published by Dmitri Mendeleev in 1869 bears little resemblance to the modern periodic table. But by listing elements in columns, and lining up the ...

PARIS, January 29. /TASS/. Russian scientists will hold the first experiments at the Super-Heavy Element Factory in Dubna near Moscow in April to synthesize the 114th and 115th elements of Mendeleev’s ...