Post #40744

Today in history. On March 6, 1869, Russian chemist Dmitri Mendeleev presented the first periodic table of elements, titled "The Dependence Between the Properties of the Atomic Weights of the Elements," to the Russian Chemical Society. He organized 63 known elements by atomic weight, leaving gaps for undiscovered elements like gallium and germanium. @googlefactss#chemistry#history#todayinhistory [read more...]