The periodic table’s arrangement also allows scientists to discern trends in element properties, including electronegativity, ionization energy, and atomic radius. Many scientists worked on the ...

This year we celebrate the 150 th anniversary of Mendeleev’s achievement in formulating the structure of the periodic table that we use today. He announced his structure in 1869, but the challenge of ...

Mendeleev’s Periodic Law earned universal recognition ... Petersburg University. The first version of the table made for demonstration in public (graphic image) at the request of Dmitry ...

Then in 1869, a Russian scientist called Dmitri Mendeleev produced one of the first practical periodic ... line in the diagram of the periodic table above separates the metals, on the left ...

Group 7 of the periodic table is something of an oddity. When the first periodic table was formulated by Mendeleev, it was the only group that contained just a single known element — manganese.

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 Periodic Table ...

Dmitri Mendeleev made order out of chaos when he introduced his periodic table in 1869 ... Sir Alexander Fleming discovered the world’s first broadly effective antibiotic – penicillin ...