The periodic table is a matrix comprising seven rows (“periods”) and 18 columns (“groups”). It organizes chemical elements by atomic number horizontally and electron configuration vertically.

Learn about and revise the periodic table with this BBC Bitesize GCSE Combined Science (Edexcel) study guide.

Elements with similar properties are arranged to form columns (groups). The periodic table is now a thing of both beauty and practical use, says Dr Wothers.

Simple periodic table chart. The image shows group/period in opposite order; periods are horizontal rows, groups are vertical columns. (click on image to enlarge) In the periodic table, periods are ...

The periodic table stares down from the walls of just about every chemistry lab. The credit for its creation generally goes to Dimitri Mendeleev, a Russian chemist who in 1869 wrote out the known ...

Posters in chemistry labs are in need of an update. The periodic table now has four new elements, completing its seventh row. The International Union of Pure and Applied Chemistry (IUPAC) and the ...