A selection of sites containing online versions of the periodic table of elements. Sites are classified according to the number of properties they display:
Very Basic: less than eight properties.
Basic: 9 - 16 properties.
Detailed: 17 - 24 properties.
Comprehensive: 25 - 32 properties.
Very comprehensive: more than 32 properties.
There are also notes when special software or browser features such as JavaScript are required.
[Basic data, includes printable version] Information on each of the chemical elements and data on their properties. Some site information is only in Czech language. www.tabulka.cz/english
[Very comprehensive, includes very detailed write ups, basic nuclide data, extensive graphics] Professional scientists and students at school will all find something useful. Includes thousands of images relating to periodicity and structure. www.webelements.com
[Nuclide data only, extensive listing of nuclides] Provides isotope data for almost all known nuclides. From Berkeley Laboratory. ie.lbl.gov/education/isotopes.htm
[No element data] An auto-scored blank periodic table. The user fills it in online and the score is returned automatically. www.ilpi.com/genchem/periodicquiz.html
[Very basic data, requires Adobe Acrobat Reader] PDF of the Periodic Table arranged in different formats. Files only contain elements' symbols, names and atomic number. science.widener.edu/~svanbram/ptable.html
[Very comprehensive data, write-ups, extensive listing of nuclides] Data on elements includes scores of properties, element names in a dozen languages and almost all known nuclides. Environmental chemistry articles round out site. EnvironmentalChemistry.com/yogi/periodic
[Basic data, requires JavaScript] Includes historical information about the elements in Italian, but the table itself is in English. www.themeter.net/elemen_e.htm
Applet-based table with visualizations of the electron shell model, the nucleus, the visual emission spectrum, and energy levels of the electrons. Also has interesting facts about each element represented. www.colorado.edu/physics/2000/applets/a2.html
[Very basic data] Minimalist table that provides symbols, atomic numbers, and atomic weight with four significant figures. www.swansontec.com/selement.htm
[Very Comprehensive data] Interactive periodic table. Includes additional information on ionisation energies, abundance, isotopes and reduction potentials. www.ktf-split.hr/periodni/en
[Very comprehensive data] Available in many languages. Interactive periodic table that includes information on compounds, appearances and nuclear, physical and electronic properties. Needs Flash. www.jergym.hiedu.cz/~canovm/vyhledav/chemici5.html
[Comprehensive] Interactive periodic table which includes enthalpy of fusion, vaporisation and molar heat capacity. Diagrams of electronic configurations and data graphs. chemistry.org/periodic_table.html