| Am | Americium | Atomic number : 95 Relative atomic mass (12C = 12.0000) : 243.0614 (Am-243) |
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| P H Y S I C A L D A T A | |
| Group 3 actanide Density / kg m-3 : 13 670 [293 K] |
Melting point / K : 1445 Boiling point / K : 2880 |
| D I S C O V E R Y | |
| Americium was discovered in 1944 by Glen T. Seaborg, R.A. James, L.O. Morgan, and A. Ghiorso at Chicago, Illinois, USA. |
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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) : n.a. Earth's crust / p.p.m. : nil |
Seawater / p.p.m. : nil |
| B I O L O G I C A L D A T A | |
| Level in humans nil |
Daily dietary intake : nil Total mass of element in average (70 kg) person : nil |
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A portrait of americium is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements. |