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14Silicio – SiliconMass: 28.08 u1s22s22p63s23p2Melting point: 1687 KBoiling point: 3538 KDensity: 2.3 g/cm3Discovery: Berzelius (1823)Silicon, metalloid, is a chemical element with the symbol Si andatomic number 14. It is less reactive than its chemical analog Carbon,butmore reactive than Germanium. Its english final name, first suggested in1817, reflects the more physically similar elements Carbon and Boron.Silicon is the second most abundant element in the Earths crust (about28% by mass) after Oxygen.