Wehrle 9781852855178 1852855177 The British Empire and the Second World War, Ashley Jackson 9780393006360 0393006360 The Monteverdi Companion, Denis Arnold, Nigel Fortune, Claude V.
Organised athletics are traced back to the Ancient Olympic Games from 776 BC, and most modern events are conducted by the member clubs of the International Association of Athletics Federations.
The electrical resistance of single crystal silicon significantly changes under the application of mechanical stress due to the piezoresistive effect. Heavily boron-doped silicon is a type II superconductor with a transition temperature Tc of 0.4 K Silicon in its more common crystalline form was not prepared until 31 years later, by Deville. By electrolyzing a mixture of sodium chloride and aluminium chloride containing approximately 10% silicon, he was able to obtain a slightly impure allotrope of silicon in 1854. Later, more cost-effective methods have been developed to isolate several allotrope forms, the most recent being silicene.
Because silicon is an important element in high-technology semiconductor devices, many places in the world bear its name.
It is a member of group 14 in the periodic table, along with carbon above it and germanium, tin, lead, and flerovium below.
It is rather unreactive, though less so than germanium, and has great chemical affinity for oxygen; as such, it was first prepared and characterized in pure form only in 1823 by J? Silicon is the eighth most common element in the universe by mass, but very rarely occurs as the pure element in the Earth's crust.