I guess I
don't understand. I thought mercury was mercury.
Chemically, a metal behaves very differently when in a compound.
Sodium metal has a tendency to react violently with water. A chunk
will fizz violently. Ground sodium in cold water will explode, due to
the higher surface area. However, if you compound it with chlorine,
you get ordinary table salt, necessary for life.
Ok, I get it. I was thinking of it as a pure substance, rather than in
a compound.