The periodic table of elements is a landmark categorization developed in 1869 by the Russian chemist and inventor Dmitri ...

The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...

The periodic table organizes elements according to similar properties — so anyone can tell the characteristics of an element simply by looking at its location on the table.

The elements on the periodic table of elements are listed in ways that emphasize certain relationships. There are families, periods (the horizonal rows) and groups (the vertical columns).

Instead, they may be made of naturally occurring "superheavy elements" beyond those listed in the periodic table — our current best catalog of 118 chemical elements — new research suggests.

In other words, it contains elements not on the periodic table at all. These elements would be stable around atomic number 164, which is far denser that Osmium, the densest known naturally ...

The periodic table of elements is a landmark categorization developed in 1869 by the Russian chemist and inventor ... It's no mean feat, the best we got was 57, a little under half — can you do ...