The periodic table of elements (often known simply as the periodic table) has been helping scientists with their work for a little over 150 years. The handy visual reference guide organizes known ...

The discovery of other elements followed regularly and soon it became necessary to arrange them in some sort of order ... line in the diagram of the periodic table above separates the metals ...

The Periodic Table is an amazing chemistry tool that is organized with elements in order of increasing atomic number. The properties of the element change as you move across the row, but are similar ...

But how many of these elements do you know? Test your knowledge and compete with other Live Science readers to see who can ...

February 7 is National Periodic Table Day, when we celebrate the efforts of scientists over the centuries to figure out how different elements ...

See if you can organize the first 25 elements of the periodic table in order in the quiz below. The periodic table as we know it is widely credited to Dmitri Mendeleev, a Russian chemist who kept ...

The records show that Mendeleev discovered the periodic system on 17 February 1869 ... at a meeting of the Russian Chemical Society. Mendeleev’s table listed elements in rows or columns in order of ...