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promethium
illinium promethium

promethium

illinium promethium CHEM.

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angielski
Interactions with tiny quantities of promethium-147 are not hazardous if certain precautions are observed.
en.wikipedia.org
Radioisotopes such as tritium, nickel-63, promethium-147, and technetium-99 have been tested.
en.wikipedia.org
Its most striking characteristic is the presence of the unstable element promethium in its emission spectrum.
en.wikipedia.org
Elements with atomic numbers 1 through 40 are all stable, while those with atomic numbers 41 through 82 (except technetium and promethium) are metastable.
en.wikipedia.org
In the periodic table, it is located to the right of the actinide uranium, to the left of the actinide plutonium and below the lanthanide promethium.
en.wikipedia.org
There are two possible sources for natural promethium: rare decays of natural europium-151 (producing promethium-147), and uranium (various isotopes).
en.wikipedia.org
The promethium in the outer envelope may be generated by the spontaneous fission of higher mass transuranic elements.
en.wikipedia.org
If a promethium leak is found, the area should be identified as hazardous and evacuated, and emergency services must be contacted.
en.wikipedia.org
Another method is to bombard uranium-238 with fast neutrons to cause fast fission, which, among multiple reaction products, creates promethium-147.
en.wikipedia.org
Where indefinite self-luminosity in darkness was required, safer radioactive promethium paint was initially used, later replaced by tritium which continues to be used today.
en.wikipedia.org

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