Periodic Table
Links
Engineers Edge
http://www.engineersedge.com/periodic_table_of_elements.htm
[Basic] Simple periodic table of elements.
EnvironmentalChemistry.com: Periodic Table of Elements
http://EnvironmentalChemistry.com/yogi/periodic/
[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.
Exploring the Table of Isotopes
http://ie.lbl.gov/education/isotopes.htm
[Nuclide data only, extensive listing of nuclides] Provides isotope data for almost all known nuclides. From Berkeley Laboratory.
Extended Periodic Table
[Very basic data] Predicted periodic table for undiscovered elements with atomic number greater than 118. Theoretical discussion and Orbital freeware available.
Fast Periodic Table
http://www.schoolscience.co.uk/periodictable.html
[Basic data] Interactive periodic table. Including uses and discovery.
Gordon England's Periodic Table of the Elements
http://www.gordonengland.co.uk/elements/index.htm
[Detailed data]
Infoplease.com: Periodic Table
http://www.infoplease.com/periodictable.php
An interactive periodic table with information about each element including the symbol, boiling point, melting point, discoverer and origin.
Interactive Periodic Table
http://www.karlazone.com/chemistry/
[Basic] An interactive period chart of the elements.
Interactive Periodic Table
[Comprehensive] Periodic table which includes atomic numbers and masses, bowling and melting points, crystal structures and detailed element descriptions.
It's Elemental - The Periodic Table of Elements
http://education.jlab.org/itselemental/
[Detailed data] Interactive periodic table. Including melting point, density, element history and crustal and oceanic abundance.