![]() By this, it causes the phosphor in the tube to fluoresce making it visible light. When electricity is passed through mercury vapour, it produces short-wave ultraviolet light in a fluorescent lamp. It is also in use in fluorescent lighting. Mercury remains in use in scientific research applications and also in amalgam for dental restoration in some locales. Mechanical pressure gauges and electronic strain gauge sensors have dominated over mercury sphygmomanometers and became a bit outdated. It is in favour of alternatives such as alcohol or Galinstan filled glass thermometers and thermistor or infrared-based electronic instruments. The toxicity of mercury has led mercury thermometers and sphygmomanometers have largely phased out in clinical environments. Mercury is in use in devices like thermometers, barometers, manometers, sphygmomanometers, float valves, mercury switches, mercury relays, fluorescent lamps etc. The red colour pigment vermilion is produced by grinding natural cinnabar or synthetic mercuric sulfide. The other element that is a liquid under these conditions is the halogen bromine, though metals such as caesium, gallium, and rubidium melt above room temperature.Mercury occurs in deposits throughout the world as cinnabar i.e., mercuric sulfide. Mercury is the only metallic element that is the liquid state at standard conditions for temperature and pressure. ![]() Mercury was formerly named hydrargyrum. It is a heavy, silvery d-block element. Mercury has a chemical symbol Hg and an atomic number of 80.
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