A portrait of chromium is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements.
| Cr | Chromium |
Atomic number : 24
Relative atomic mass (12C = 12.0000) : 51.9961 |
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| P H Y S I C A L D A T A | |
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Group 6 transition metal Density / kg m-3 : 7190 [293 K]; 6460 [liquid at m.p.] |
Melting point / K : 2130 ± 20 Boiling point / K : 2945 |
| D I S C O V E R Y | |
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Discovered and isolated in 1780 by Nicholas Louis Vauquelin at Paris, France. |
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| G E O L O G I C A L D A T A | |
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Abundances Sun (relative to H = 1 × 1012) : 5.13 × 105 Earth's crust / p.p.m. : c. 100 Residence time / years : 10 000 Classification : recycled Oxidation state : VI |
Seawater / p.p.m. : Atlantic surface : 1.8 × 10-4 Atlantic deep : 2.3 × 10-4 Pacific surface : 1.5 × 10-4 Pacific deep : 2.5 × 10-4 |
| B I O L O G I C A L D A T A | |
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Level in humans Blood / mg dm-3 : 0.006 - 0.11 Bone / p.p.m. : 0.1 - 0.33 Liver / p.p.m. : 0.02 - 3.3 Muscle / p.p.m. : 0.024 - 0.84 |
Daily dietary intake : 0.01 - 1.2 mg Total mass of element in average (70 kg) person : 14 mg |
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A portrait of chromium is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements. |