Mercury's most obvious and well known property is that is a liquid at room temperature. Another obvious property of mercury is its silvery metallic color. Finally, mercury's comparatively low boiling...
It's lightweight and very flammable.
It has alot of poison and bad stuff enough to kill you!!
http://myamazingfact.blogspot.com/2009/02/18-of-natures-most-powerful-medicinal.html
Density