Basically, it's not good.
color change when fusion happen. but mercury does't fuse with most of element.
It creates a Solid Explosive if left for a short while
for diffraction grating mercury lamp is used not sodium lamp.
A cooled saturated solution of copper chloride will precipitate crystals of copper chloride.
Nothing would happen.
Crystals of Arborea happened in 1990.
Crystals of Zong happened in 1983.
Mercury Meltdown happened in 2006.
it forms crystals
steel will float in mercury
Sodium chloride is very soluble in water; these crystals will be dissolved.
no
level of mercury fall down
Mercury Meltdown Revolution happened in 2007.
Archer Maclean's Mercury happened in 2005.
They would float on the surface of the Mercury but they wouldn't react with the Mercury.
Mercury causes major neurological problems.