It has a negative temperature coefficient of resistance, since the number of free charge carriers increases with temperature. The 1s, 2s, 2p and 3s subshells are completely filled while the 3p subshell contains two electrons out of a possible six. 0% of the Earth's crust is composed of silicate minerals, making silicon the second most abundant element in the Earth's crust (about 2. It is most widely distributed in dusts, sands, planetoids, and planets as various forms of silicon dioxide (silica) or silicates. 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 1. A hard and brittle crystalline solid with a blue- gray metallic luster, it is a tetravalent metalloid. Silicon is a chemical element with symbol Si and atomic number 1. Pour faire cette validation, l'exemple utilise le composant interne livr. Liste des exemples LSTCet exemple permet de valider une adresse postale (rue, code postal et ville).
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