Silicon 14
Panagway crystalline, reflective with bluish-tinged faces Kinatibuk-ang mga kinaiya Ngalan,simbolo ,kaiphan silicon, Si, 14 Paglitok /ˈ s ɪ l ᵻ k ən [[Help:Pronunciation respelling key|Plantilya:Smallcaps all or/ˈ s ɪ l ᵻ k ɒ n [[Help:Pronunciation respelling key|Plantilya:Smallcaps all Kategoriyang elemento metalloid Group ,period ,block 14 , 3 ,p Gibug-aton sa atomo 28.085(1) Kontorno sa elektron [ Ne ] 3s2 3p2 Electron shells of silicon History Prediction Antoine Lavoisier Pagkadiskobre Jöns Jacob Berzelius [ 1] [ 2] First isolation Jöns Jacob Berzelius Named by Thomas Thomson Physical properties Phase magahi Density (nearr.t. )2.3290 g·cm−3 Liquiddensity atm.p. 2.57 g·cm−3 Melting point 1687 K , 1414 °C, 2577 °F Boiling point 3538 K, 3265 °C, 5909 °F Heat of fusion 50.21kJ·mol−1 Heat of vaporization 359 kJ·mol−1 Molar heat capacity 19.789 J·mol−1 ·K−1 Vapor pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1908 2102 2339 2636 3021 3537
Atomic properties Oxidation states 4 , 3, 2, 1[ 3] amphoteric oxide)Electronegativity 1.90 (Pauling scale) Ionization energies more )1st: 786.5 kJ·mol−1 2nd: 1577.1 kJ·mol−1 3rd: 3231.6 kJ·mol−1 Atomic radius 111 pm Covalent radius 111 pmVan der Waals radius 210 pmMiscellanea Crystal structure diamond cubic Magnetic ordering diamagnetic [ 4] Electrical resistivity (20 °C) 103 [ 5] Thermal conductivity 149 W·m−1 ·K−1 Thermal expansion (25 °C) 2.6 µm·m−1 ·K−1 Speed of sound (thin rod)(20 °C) 8433 m·s−1 Young's modulus 130-188[ 6] Shear modulus 51-80[ 6] Bulk modulus 97.6[ 6] Poisson ratio 0.064 - 0.28[ 6] Mohs hardness 7 CAS registry number 7440-21-3 Band gap energy at 300 K1.12eV Most stable isotopes Main article:Isotopes of silicon · r 
