Columns in the periodic table are called groups or families. Elements within the same group share similar properties because they have the same number of valence electrons (electrons in the ...

Kosuke Morita, researcher of Riken (Institute of Physical and Chemical Research) who led a group discovered element 113, points to a periodic table of the elements during a press conference at the ...

In this periodic table of elements quiz, you have 10 minutes to name as many elements as you can, given only their symbol, atomic weight and the broad group they live in. It's no mean feat, the ...

In the past 250 years, new elements have been added to the table about once every 2 ½ years on average, said Paul Karol of Carnegie Mellon University. He chaired the committee that recognized the ...

The Group 1 elements are called the alkali metals. They include lithium, sodium and potassium, and are placed in the first vertical column on the left of the periodic table.

Discover who created the periodic table of elements and how it works. Learn about Dmitri Mendeleev’s contributions, its structure, and why it’s essential for science.

Kosuke Morita of Riken Nishina Center for Accelerator-Based Science points at periodic table of the elements during a press conference in Wako, Saitama prefecture, near Tokyo Thursday, Dec. 31, 2015.

In this periodic table of elements quiz, you have 10 minutes to name as many elements as you can, given only their symbol, atomic weight and the broad group they live in.