Part 1 of Essay
’s symbol is Hg, its atomic number is 80, its atomic mass is 200.59, its in group 12 and in period 6, and it also has two valence electrons. Its standard state is liquid at 298ºK and it is the heaviest known elemental liquid. It has a silvery white color. It is named after the planet "" the origin of the symbol Hg ....

Part 2 of Essay
.... The most important salts are mercuric chloride HgC12 which is a corrosive and violent poison. Mercurous chloride Hg2Cl2 which used to be used in medicine. fulminate Hg(ONC)2 used as a detonator in explosives and mercuric sulfide HgS used as a high-grade paint pigment. Organic compounds are important and dangerous. Methyl is a lethal pollutant found in rivers and lakes. is a virulent poison and is readily absorbed through the respiratory tract, the gastrointestinal tract, or through unbroken skin. ....