Changes

{{periodictable}}

{{periodictable}}

[[Image:Aqw.jpg|right|thumb|300px|circular periodic table]]

[[Image:Aqw.jpg|right|thumb|300px|circular periodic table]]

The Periodic Table is an arrangement of chemical [[elements]] first developed by [[Russia|Russian]] [[chemistry|chemist]] [[Dimitri Mendeleev]].  Its layout accurately arranges elements by their [[electron]] configuration, atomic number, and chemical properties.

The '''Periodic Table of Elements''' is an arrangement of chemical [[elements]] first developed by [[Russia|Russian]] [[chemistry|chemist]] [[Dimitri Mendeleev]].  Its layout accurately arranges elements by their [[electron]] configuration, atomic number, and chemical properties.

[[Category:Chemistry]]

[[Category:Chemistry]]