mercury

Description

At normal atmospheric pressure at room temperature the only metal present in the liquid. Melting point **8.*7 ℃, boiling point **6.6 ℃, density of *3.*9 g / cc. Silver-white liquid metal. Cohesion is very strong, stable in air. A highly toxic vapor. Dissolved in hot concentrated sulfuric acid and nitric acid, but with dilute sulfuric acid, hydrochloric acid, alkali not work. It can dissolve many metals. Valence of *1 and *2. Seven mixture of isotopes of mercury. Has a strong affinity to sulfur and copper affinity, ie under normal, it is easy to form a stable compound with elemental sulfur and copper of the merger, and therefore in the laboratory usually use elemental sulfur to deal with the mercury spill, but in fact the sulfur mercury reaction is very slow, so ferric chloride or iodine - potassium iodide is a better choice for dealing with mercury.