Sn is tin, pronounced xī.
Tin is a metallic element, pronounced xī, with the symbol Sn and atomic number 50.Commonly, white tin is silvery-white, malleable, and does not change easily in air. Mostly used for iron plating, soldering metals or making alloys. Some areas called pewter.
Tin is inorganic, common form of white tin is a silver-white luster of the low melting point of the metal, in compounds is divalent or tetravalent, at room temperature will not be air oxidation, the natural world mainly in the form of dioxide (cassiterite) and a variety of sulfides (eg, sulphurous stannum) exists. Tin is one of the big-name hardware - gold, silver, copper, iron and tin.
Tin was discovered and used as early as ancient times. In some of China's ancient tombs, often unearthed some tin pots, tin candlesticks and other tin objects. According to evidence, China's Zhou Dynasty, the use of tin has been very common. In the Egyptian tombs, also found in tin daily necessities.
Tin in industry and daily life has a variety of uses, common uses are: brazing, packaging materials, the electronics industry, casting, medical equipment, cosmetics, art and decoration
1, brazing: tin with its low melting point and good mobility and is widely used in the soldering and brazing process, used to connect metal parts and electronic components. components.
2, packaging materials: tin is used as packaging materials for food and beverages, especially in the manufacture of canned food and beverages. Tin cans have good sealing and anticorrosion properties, which help to keep food fresh and long-term preservation.
3, the electronics industry: tin is widely used in the electronics industry. It is used to make electronic components, circuit boards and soldering connections, such as in TVs, cell phones, computers and other equipment.
4, casting: tin alloy can be used for casting a variety of parts and manufacturing handicrafts, such as pencil lead, pendulum, spoon and so on.
5, medical equipment: tin alloy is used in the manufacture of medical equipment for the production of artificial joints, dental equipment and surgical instruments.
6, cosmetics: tin is often used as a regulator, emulsifier and stabilizer in cosmetics to help enhance the texture and stability of the product.
7, art and decoration: due to the high plasticity and accessibility of tin, it is used to make a variety of artwork, decorative items and gifts, such as sculpture, lead printing and handicrafts.