3 links
Joint Expert Speciation System
jess.murdoch.edu.au
Thermochemical database for modelling aqueous solution chemistry, including more than 230,000 critically-assessed equilibrium constants and enthalpies for about 70,000 reactions.
NIST Chemistry WebBook
ebbook.nist.gov
This National Institute of Standards and Technology website provides thermochemical, thermophysical, and ion energetics data. Information and data on gas-phase ion, organic, and or…
WebElements Periodic Table of the Elements
ebelements.com
Interactive periodic table. Clicking on an element brings up a list of general properties and data, and information on its discovery, history, uses, geologic occurrence and abundan…