| Si | Silicon | Atomic number : 14 Relative atomic mass (12C = 12.0000) : 28.0855 |
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| P H Y S I C A L D A T A | |
| Group 14 non-metal Density / kg m-3 : 2329 [293 K]; 2525 [liquid at m.p.] |
Melting point / K : 1683 Boiling point / K : 2628 |
| D I S C O V E R Y | |
| Discovered in 1824 by J.J. Berzelius at Stockholm, Sweden. |
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| G E O L O G I C A L D A T A | |
| Abundances Sun (relative to H = 1 × 1012) : 4.47 × 107 Earth's crust / p.p.m. : 277 100 Residence time / years : 30 000 Classification : recycled Oxidation state : IV |
Seawater / p.p.m. : Atlantic surface : 0.03 Atlantic deep : 0.82 Pacific surface : 0.03 Pacific deep : 4.09 |
| B I O L O G I C A L D A T A | |
| Level in humans Blood / mg dm-3 : 3.9 Bone / p.p.m. : 17 Liver / p.p.m. : 12 - 120 Muscle / p.p.m. : 100 - 200 |
Daily dietary intake : 18 - 1200 mg Total mass of element in average (70 kg) person : c. 1 g |
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A portrait of silicon is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements. |