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Atomic Number	14

Atomic Symbol	Si

Atomic Weight	28.0855 amu

Group	Metalloid, 14

Form	Solid

Density @ STP	2.3290 g/cm³

Melting Point	1414 °C (2577.2 °F, 1687.2 °K)

Boiling Point	3265 °C (5909 °F, 3538.2 °K)

Heat of Fusion	50.21 kJ/mol

Heat of Vaporization	359 kJ/mol

First Ionization Potential	8.15169 eV

Electronegativity (on Pauling scale	1.91

Specific Heat Capacity	0.705 J/g K

Ground State Electron Configuration	3p²

Oxidation State(s)	+2, +4, -4

Stable Isotopes and Natural Abundance on Earth	²⁸Si, 92.23%; ²⁹Si, 4.67%; ³⁰Si, 3.10%

Selected Radioisotopes	³²Si

Atomic Radius	111 pm

Crystal Structure	Diamond

Discovered by	Berzelius, 1824