#50
Properties Facts Text Forms Glossarys Bibliography
Text Symbol Sn Atomic number #50 Atomic weight 118.71 Oxidation States +2,+4 Electronegativity pauling 1.96 State at RT Solid metal Melting point 505.1 Boiling point 2543	Properties Ordinary tin is composed of nine stable isotopes; 18 unstable isotopes are also known. ordinary tin is a silver-whhite metal, is malleable, somewhat ductile, and has a highly crystalline structure. Due to the breaking of these crystals, a "tin cry" is heard when a bar is bent. As soon as tin metal is exposed to the air it develops a strong, gas light coastingthat prevents it from being corroded further.	Facts Date of Discovery Known to the ancient Discover Unknown Name origin latin Symbol orygin Fom the latin world stannum (tin) Uses Coating for steel cans
Forms The element has two alloptropic forms at normal pressure. on warming, gray, or alpha tin, with a cubic structure, changes at 13.2ºC, into white, or beta tin, the ordinary form of the metal. White tin has a teragonal structure. When tin is cooled below 13.2ºC, it changes from white to gray. This changes it's effected by impurities such as alumanium and zinc, and can be prevented by small additions of antimony or bismuth. this change from the alpha to beta form is called the tin pest. there are few if aany uses for gray tin. Tin takes a high polish and is used to coat other metals to prevent corrosion or other or other chemical action. Such tin plate over steel used in the so-called tin can for preserving food. Tin resist distilled sea and soft tap water, but is attached by strong acids, alkalis, and acid salts, and salts. oxygen in solution accelerates the attack. When heated in air, tin forms Sn2, which is feebly acids. Most of the supplies for tin comes from Malaya, Bolivia, Indonesia, zaire, Thailand and
Glossary Allotropic: The existence, especially in the solid state, of two or more crystalline or molecular structural forms of an element. Crystalline: Resembling crystal, as in transparency or distinctness of structure or outline. Reverberatory: Produced or operating by reverberation; deflected or diverted, as flame or heat, onto material being treated. Superconductive: The flow of electric current without resistance in certain metals, alloys, and ceramics at temperatures near absolute zero, and in some cases at temperatures hundreds of degrees above absolute zero.
Bibliography Chemical Elements web elements