InfoFries - PDF Periodic Tables
- Provides various printable periodic tables in PDF format - from the simplest to the very detailed.
- http://infofries.freehostia.com/science/periodic_tables.php

Periodic Table of Data
- [Basic data] Interactive periodic table. Including uses and discovery.
- http://www.chemsoc.org/networks/learnnet/ptdata/welcome.htm

Elements of life
- Educational/promotional flash presentation highlighting the roles of several chemical elements in a diverse range of end products.
- http://www.elements-of-life.org/

Chemistry.org Periodic Table from the American Chemistry Society
- [Comprehensive] Interactive periodic table which includes enthalpy of fusion, vaporisation and molar heat capacity. Diagrams of electronic configurations and data graphs.
- http://chemistry.org/portal/a/c/s/1/acsdisplay.html?DOC=sitetools%5Cperiodic_table.html

Periodic Table ADventure
- [No data] Includes the history of the periodic table and information on the structure of atoms and the periodic table.
- http://web.buddyproject.org/web017/web017/

Elemental - Is it time to revamp the periodic table?
- Article by Jon Lackman, on Slate magazine, about an alternative periodic table, shaped as a galaxy, designed by Oxford ecologist Philip Stewart. Includes a slide show and pictures.
- http://www.slate.com/id/2122919?nav=wp

Periodic Table of the Elements - ChemGlobe
- [Detailed data, includes write-ups, basic nuclide data, printable version] Chemical elements database from ChemGlobe.
- http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/

Printable periodic table
- Two up-to-date periodic tables in PDF format.
- http://www.profmokeur.ca/chemistry/printable_periodic_table.htm

Periodic Table
- An interactive clickable periodic table of the elements, which contains basic element properties and descriptions.
- http://the-periodic-table.org/

Periodic table
- Printable Interactive periodic table of the elements, chemistry data tables and pictures of elements.
- http://profmokeur.ca/chemistry/

The Elements and Isotopes
- The Elements and Isotopes is a comprehensive application that will display information from the Periodic Table and the Table of the Isotopes.
- http://www.infini-t.com

Interactive Periodic Table
- Easily visualize relative differences between elements by dynamically coloring table (and generating graphs) based on elements attributes.
- http://www.touchspin.com/chem/

The Periodic Table
- Features an interactive table based on the IOUPAC 1985 standard.
- http://www.periodic-table.org.uk

A Periodic Table of the Elements at Los Alamos National Laboratory
- [Very basic data, detailed write-ups] The Chemical Science and Technology division's Periodic Table describes the history, properties, resources, uses, isotopes, forms, costs, and other information for each element.
- http://periodic.lanl.gov/

Engineers Edge
- [Basic] Simple periodic table of elements.
- http://www.engineersedge.com/periodic_table_of_elements.htm

Periodic Table of Parameters
- [Basic] This table lists and describes some well documented and validated parameter sets available for modeling each element by Molecular Mechanics and Quantum Mechanics molecular modeling methods.
- http://www.chamotlabs.com/Freebies/Table/parameters-table.html

NIST Ground Levels and Ionization Energies for the Neutral Atoms
- [Basic] Periodic table includes ground-state electron configuration, ground-state level, ionization energy, state and frequently used fundamental physical constants.
- http://physics.nist.gov/PhysRefData/IonEnergy/ionEnergy.html

Periodic Table of Elements
- [Detailed] Includes general information about an element, atomic number and weight, shells and filling orbital, melting and boiling point, covalent and atomic radius, and lots of other parameters.
- http://atlas.chemistry.uoc.gr/ptoe/

DreamWave Periodic Table of the Elements
- An interactive javascripted periodic table, which contains basic element properties.
- http://www.dreamwv.com/primer/page/s_pertab.html

Table of the Nuclides
- [Nuclide data only, very extensive listing of nuclides] Map of all known nuclides, with their atomic mass, radioactive decay modes and half-lives, and related information. Brookhaven National Laboratory.
- http://atom.kaeri.re.kr/

Periodic Table of the Elements
- [Basic data] Simple click on periodic table. Includes electrical conductivity and ionization energies.
- http://www.crunchmachine.com/scieng.html

Infoplease.com: Periodic Table
- An interactive periodic table with information about each element including the symbol, boiling point, melting point, discoverer and origin.
- http://www.infoplease.com/periodictable.php

Lenntech Periodic table
- Interactive periodic table. Containing physical data, chemical properties and health and environmental effects. Available in five languages.
- http://www.lenntech.com/periodic-chart.htm

Chemistry / Periodic table Quiz
- Millionaire type periodic table quiz. Has a link to other science quizzes.
- http://www.triv.net/html/Users1/u4237.htm

YOGI's Periodic Table of the Elements
- [Basic data] Information includes nuclides.Interactive periodic table.
- http://www.uaf.edu/geology/reference/periodic/

eFunda: Periodic Table
- [Basic data] Interactive periodic table. Includes electrical resistivity, vaporization enthalpy and heat capacity.
- http://www.efunda.com/materials/elements/periodic_table.cfm

Science: Periodic Table from tcaep.co.uk
- [Detailed data] Interactive periodic table. Includes electronegativity, density, conductivity and molar volumes.
- http://www.tcaep.co.uk/science/periodic/

It's Elemental - The Periodic Table of Elements
- [Detailed data] Interactive periodic table. Including melting point, density, element history and crustal and oceanic abundance.
- http://education.jlab.org/itselemental/

Model Periodic Table - Model Science Software
- [Basic data] Interactive periodic table by Model Science Software. Available in English and Spanish, web based, Windows and Mac versions. Includes customizable quiz features.
- http://modelscience.com/PeriodicTable.html

The 'Periodic Table' Table
- [Basic data] Based on a wooden 'periodic table' table. Contains photographs of over 200 element samples, with descriptions, experiments, and stories about many of them. Winner of the 2002 Ig Nobel prize in Chemistry.
- http://theodoregray.com/PeriodicTable

The Extended Periodic Table Of The Elements
- [No elemental data] Alternate versions of the extended periodic table. Include information on symmetry and electronic configurations.
- http://jeries.rihani.com/

Science-Park's Periodic Table of the Elements
- [Detailed data] Interactive periodic table including boiling and melting point, discovery, thermal conductivity and density. Nice section where you can put the elements in order of their conductivity, melting point and other properties.
- http://www.science-park.info/periodic

Proton Don - Funbrain Periodic Table Game
- A fun way for youngsters to learn the periodic table. Includes learning by symbol or by name.
- http://www.funbrain.com/periodic/

Extended Periodic Table
- [Very basic data] Predicted periodic table for undiscovered elements with atomic number greater than 118. Theoretical discussion and Orbital freeware available.
- http://www.apsidium.com/

Quiz Hub: Element Symbol Quiz
- [Basic data] Quiz that involves remembering symbols. Includes copy of periodic table with data.
- http://quizhub.com/quiz/f-elements.cfm

VRML Periodic Table
- [Very basic date, requires VRML] Visual representations of the Bohr model of the atom in 3D.
- http://www.psinvention.com/periodic.htm

Elementymology and Elements Multidictionary
- Explains the origins of the names of the chemical elements and lists element names in scores of languages.
- http://www.vanderkrogt.net/elements/

Gordon England's Periodic Table of the Elements
- [Detailed data]
- http://www.gordonengland.co.uk/elements/index.htm

Printable Periodic Table
- [Very basic data] Minimalist table that provides symbols, atomic numbers, and atomic weight with four significant figures.
- http://www.swansontec.com/selement.htm

David's Whizzy Periodic Table
- 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.
- http://www.colorado.edu/physics/2000/applets/a2.html

On-line The Periodic Table of Elements
- [Basic data, requires JavaScript] Includes historical information about the elements in Italian, but the table itself is in English.
- http://www.themeter.net/elemen_e.htm

Chemicool Periodic Table
- [Detailed information on each element, no write-ups]
- http://www.chemicool.com/

Large color text-only printable periodic table
- [Basic data] All data including electron configuration on one page, available as PDF, PNG, and HTML.
- http://www.dayah.com/periodic/

EnvironmentalChemistry.com: Periodic Table of Elements
- [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.
- http://environmentalchemistry.com/yogi/periodic/

The Periodic Table Challenge
- [No element data] An auto-scored blank periodic table. The user fills it in online and the score is returned automatically.
- http://www.ilpi.com/genchem/periodicquiz.html

ChemicalElements.com: Online Periodic Table
- [Basic data, limited write-ups] Provides information on the 109 named elements plus elements 110 - 112.
- http://www.chemicalelements.com

Exploring the Table of Isotopes
- [Nuclide data only, extensive listing of nuclides] Provides isotope data for almost all known nuclides. From Berkeley Laboratory.
- http://ie.lbl.gov/education/isotopes.htm

X-Ray Properties of the Elements
- [X-ray properties only] X-ray properties of most of the elements.
- http://www.csrri.iit.edu/periodic-table.html

Visual Elements
- [Detailed data, write-ups, basic listing of nuclides] The Royal Society of Chemistry's (in the UK) contribution to chemistry on the web.
- http://www.chemsoc.org/viselements/pages/periodic_table.html

PTE Periodic Table of the Elements
- [Very basic data, includes writeups, Requires Javascript]
- http://pte.8k.com