A portrait of praseodynium is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements.
| Pr | Praseodynium |
Atomic number : 59
Relative atomic mass (12C = 12.0000) : 140.90765 |
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| P H Y S I C A L D A T A | |
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Group 3 lanthanide Density / kg m-3 : 6773 [293 K] |
Melting point / K : 1204 Boiling point / K : 3785 |
| D I S C O V E R Y | |
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Separated in 1885 by Baron Auer von Welsbach at Vienna, Austria. |
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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) : 4.6 Earth's crust / p.p.m. : 9.5 Residence time / years : n.a. Oxidation state : III |
Seawater / p.p.m. : Atlantic surface : 4 × 10-7 Atlantic deep : 7 × 10-7 Pacific surface : 4.4 × 10-7 Pacific deep : 10 × 10-7 |
| B I O L O G I C A L D A T A | |
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Level in humans Organs: n.a., but very low |
Daily dietary intake : n.a. Total mass of element in average (70 kg) person : n.a., but very low |
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A portrait of praseodynium is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements. |