A portrait of caesium is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements.
| Cs | Caesium / Cesium (US) |
Atomic number : 55
Relative atomic mass (12C = 12.0000) : 132.90543 |
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| P H Y S I C A L D A T A | |
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Group 1 alkali metal Density / kg m-3 : 1873 [293 K]; 1843 [liquid at m.p.] |
Melting point / K : 301.55 Boiling point / K : 951.6 |
| D I S C O V E R Y | |
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Discovered in 1860 by R. Bunsen and G.R. Kirchhoff at Heidelberg, Germany. |
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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) : < 80 Earth's crust / p.p.m. : 3 Residence time / years : 600 000 Classification : accumulating Oxidation state : I |
Seawater / p.p.m. : 3.0 × 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 : 0.0038 Bone / p.p.m. : 0.013 - 0.052 Liver / p.p.m. : 0.04 - 0.05 Muscle / p.p.m. : 0.07 - 1.6 |
Daily dietary intake : 0.004 - 0.03 mg Total mass of element in average (70 kg) person : c. 6 mg |
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A portrait of caesium is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements. |