Mercury element has 80 protons, 121 neutrons and 80 electrons.
Mercury is a heavy white colored metal, remains liquid at room temperature.
Mercury is widely used for thermometer. It's toxic.
» Common Mercury compounds:
• Mercury(I) Chloride, Hg2Cl2
• Mercury(II) Oxide, HgO
• Mercury(II) Chloride, HgCl2
• Mercury(I) Oxide, Hg2O
• Mercury(II) Bromide, HgBr2
• Mercury(II) Acetate, Hg(C2H3O2)2