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 ...

As we have seen, Mendeleev was not the first to attempt to find order within the elements, but it is his attempt that was so successful that it now forms the basis of the modern periodic table.

Substances have both physical and chemical properties. Developing the periodic table The periodic table was developed by grouping elements with similar properties. This, together with a later ...

Most of his ideas have stood the test of time, despite being conceived long before ... which give the periodic table its name. Elements with similar properties are arranged to form columns ...

Want to learn more about this centerpiece of chemistry? Take your pick from this collection of links about elements and the periodic table! Build an element ball, solve periodic puzzles, and check out ...

Elements in ... their reactions to form negative ions. The ions formed have a full outer electron shell, so are very stable. See the study guide on groups in the periodic table for more information.