| Sr | Strontium | Atomic number : 38 Relative atomic mass (12C = 12.0000) : 87.62 |
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| P H Y S I C A L D A T A | |
| Group 2 alkaline earth metal Density / kg m-3 : 2540 [293 K]; 2375 [liquid at m.p.] |
Melting point / K : 1042 Boiling point / K : 1657 |
| D I S C O V E R Y | |
| Strontium was recognized as an element in 1790 by A. Crawford at Edinburgh, Scotland. Isolated in 1808 by Sir Humphry Davy at London, England. |
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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) : 790 Earth's crust / p.p.m. : 370 Residence time / years : 4 × 106 Classification : recycled Oxidation state : II |
Seawater / p.p.m. : Atlantic surface : 7.6 Atlantic deep : 7.7 Pacific surface : 7.6 Pacific deep : 7.7 |
| B I O L O G I C A L D A T A | |
| Level in humans Blood / mg dm-3 : 0.031 Bone / p.p.m. : 36 - 140 Liver / p.p.m. : 0.05 - 0.36 Muscle / p.p.m. : 0.12 - 0.35 |
Daily dietary intake : 0.8 - 5 mg Total mass of element in average (70 kg) person : 320 mg |
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A portrait of strontium is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements. |