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| Fundamental |
| quote: | Originally posted by Ste
PA means many things, perhaps you should elaborate! :stongue: |
Procrastinators Anonymous!
I'm gonna join... soon.
Or alternatively...
Name: Protactinium
Atomic Number: 91
Symbol: Pa
Atomic weight: 231.0359
The atomic weight of protactinium is 231.0359, its melting point is < 1600°C, specific gravity has been calculated to be 15.37, with a valence of 4 or 5. Protactinium has a bright metallic luster which is retained for a while in air. The element is superconductive below 1.4K. Several protactinium compounds are known, some of which are colored. Protactinium is an alpha emitter (5.0 MeV) and is a radiological hazard which requires special handling. Protactinium is one of the rarest and most expensive naturally occurring elements. |
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| Dervish |
| quote: | | Originally posted by Fundamental The atomic weight of protactinium is 231.0359, |
Sure it's not 231.0358? I always thought it was that but maybe I'm wrong... hmmm.... yes yes pehaps it is 231.0359 after all. |
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| Fundamental |
| quote: | Originally posted by Dervish
Sure it's not 231.0358? I always thought it was that but maybe I'm wrong... hmmm.... yes yes pehaps it is 231.0359 after all. |
Time to get the old kitchen scales out, I think... :D |
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| mentalbarter |
| i want some protactinium:( |
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