Such questions exercised physicists greatly in the decades after Dmitri Mendeleev introduced his periodic table of the chemical elements in 1869. They received new impetus around the turn of the ...

In 1869, chemist Dmitri Mendeleev introduced his concept of a periodic table of elements at a meeting of the Russian Chemical Society in St. Petersburg. In 1912, Oreo cookies were first introduced ...

And even though there are other scientists who made contributions, it is Russian chemist and inventor Dmitri Mendeleev’s name that is always at the forefront. Mendeleev was the youngest of ...