| Zn | Zinc | Atomic number : 30 Relative atomic mass (12C = 12.0000) : 65.39 |
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| P H Y S I C A L D A T A | |
| Group 12 transition metal Density / kg m-3 : 7133 [293 K]; 6577 [liquid at m.p.] |
Melting point / K : 692.73 Boiling point / K : 1180 |
| D I S C O V E R Y | |
| Known in India and China before 1500 |
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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) : 2.82 × 104 Earth's crust / p.p.m. : 75 Residence time / years : 5000 Classification : recycled Oxidation state : II |
Seawater / p.p.m. : Atlantic surface : 0.5 × 10-4 Atlantic deep : 1.0 × 10-4 Pacific surface : 0.5 × 10-4 Pacific deep : 5.2 × 10-4 |
| B I O L O G I C A L D A T A | |
| Level in humans Blood / mg dm-3 : 7.0 Bone / p.p.m. : 75 - 170 Liver / p.p.m. : 240 Muscle / p.p.m. : 240 |
Daily dietary intake : 5 - 40 mg Total mass of element in average (70 kg) person : 2.3 g |
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A portrait of zinc is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements. |