File:Promethium.jpg
Promethium.jpg (400 × 400 pixels, file size: 25 KB, MIME type: image/jpeg)
Summary
Promethium is the second element after technetium, of which no stable isotopes exist. However, it is much more unstable than this, the most long-lived isotope, 145Pm, has a half-life of just under 18 years. The only natural isotope, 147Pm, has a half-life on only about two and a half years. This on Earth occurs only in traces, most of it is from nuclear waste. There are some few, very special applications for promethium, e.g. in radioisotope thermoelectric generators. Very few stars contain promethium, which they seem to produce themselves, however they may do that.
Copyright status:
The images are licensed under a Creative Commons Attribution 3.0 Unported License, unless otherwise noted. Attribution by linking to the according element page.
Source:
http://images-of-elements.com/promethium.php Images of Elements
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:59, 4 January 2010 | | 400 × 400 (25 KB) | Terra (talk | contribs) | Promethium is the second element after technetium, of which no stable isotopes exist. However, it is much more unstable than this, the most long-lived isotope, 145Pm, has a half-life of just under 18 years. The only natural isotope, 147Pm, has a half-life |
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