Answer:
A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom. Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds. They contain only one type of molecule.
Mercury naturally exists in Liquid state.
On Condensing it can exist in Solid state as well.
Hope it helps...
Regards;
Leukonov/Olegion.