For many years, the very existence of francium was a matter of conjecture. It was Dmitri Mendeleev - the father of the periodic table \- who first theorized that there might be an undiscovered ...

That's why the U.S. presence on the periodic table seems so meager: Just three elements—americium, berkelium, and californium—are named for locations here.

More than three-quarters of the elements on the periodic table exist naturally on Earth or elsewhere in the Universe. The last naturally occurring element to be discovered was francium (87) in 1939.

International Year of the Periodic Table: 150th Anniversary of Dimitri Mendeleev's Genius Creation. Published Jan 07, 2019 at 11:21 AM EST Updated Jan 07, 2019 at 11:24 AM EST.

2019 is the International Year of the Periodic Table. The person who typically gets credit for its creation is Dimitri Mendeleev. But there were many more chemists who should be recognized.

The seventh row of the periodic table is complete, resplendent with four new names for the elements 113, 115, 117 and 118.The International Union of Pure and Applied Chemistry (the organization ...

The period table song, featuring 118 elements. This is a corrected version of a story originally published Jan. 28, 2019. The earlier story said the Periodic Table was published in 1859 instead of ...

The origins of the periodic table, however, go back to the 1860s. Russian chemist Dmitri Mendeleev, building on the work of others, took the 63 known elements — including hydrogen, ...

It was Dmitri Mendeleev - the father of the periodic table - who first theorized that there might be an undiscovered alkali metal lurking somewhere in the universe with an atomic number of 87.