Periodic Table

The periodic table

All the different elements are arranged in a chart called the periodic table. A Russian scientist called Dmitri Mendeleev produced one of the first practical periodic tables in the 19th century. The modern periodic table is based closely on the ideas he used:

• the elements are arranged in order of increasing atomic number
• the horizontal rows are called periods
• the vertical columns are called groups
• elements in the same group are similar to each other

                           Learn more at: The Periodic Table