The periodic table is a way of displaying all of the elements ever known to mankind, with their names, chemical symbols and atomic information. Below is an example of a table entry.
The table has 118 elements, or entries. It is organised into rows (known as periods) and columns (which are called groups).
The first periodic table was created by Dmitri Mendeleev in 1869. Since then, it has been regularly updated with new elements, both natural and man-made, that have been discovered.
New elements have been added to the table as recently as 2010.
It is a table that contains all elements, both metals and non-metals, known to us. Some of these elements, such as carbon, aluminium and helium, are well-known.
There are other less well-known elements on the periodic table, including erbium, tennessine and nobelium.
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