Mercury
Links
Why Worry About Mercury : Chemical Properties
http://pasture.ecn.purdue.edu/~mercury/src/why2.htm#properties
Gives some chemical properties of mercury, as well as hazard precautions when dealing with mercury.
EnvironmentalChemistry.com: Mercury : Nuclides
http://environmentalchemistry.com/yogi/periodic/Hg-pg2.html
Extensive information on the nuclides of mercury, including potential parent nuclides.
Lenntech: Mercury
http://www.lenntech.com/Periodic-chart-elements/Hg-en.htm
Physical data, chemical properties, health and environmental effects.
Mercury, Get Mad Now, Not Later
http://www.wlssd.duluth.mn.us/publications/mercury.htm
Gives a description of mercury, as well as its uses and environmental and health hazards associated with it.