promethium in the Oxford-Paravia Italian Dictionary

Translations for promethium in the English»Italian Dictionary

promethium [Brit prəˈmiːθɪəm, Am prəˈmiθiəm] N CHEM

promethium

promezio m

promethium

prometeo m

Translations for promethium in the Italian»English Dictionary

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promezio

promethium

Monolingual examples (not verified by PONS Editors)

English

Finally, promethium can be formed in nature as a product of spontaneous fission of uranium-238.

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However, if the packaging is damaged, then promethium becomes dangerous to the environment and humans.

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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.

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There are two possible sources for natural promethium: rare decays of natural europium-151 (producing promethium-147), and uranium (various isotopes).

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Examples include technetium-95 and promethium-146.

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Many properties of promethium rely on its position among lanthanides and are intermediate between those of neodymium and samarium.

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Elements with atomic numbers 1 through 40 are all stable, while those with atomic numbers 41 through 82 (except technetium and promethium) are metastable.

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Only the highly unstable and radioactive promethium rare earth is quite scarce.

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Another method is to bombard uranium-238 with fast neutrons to cause fast fission, which, among multiple reaction products, creates promethium-147.

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The promethium in the outer envelope may be generated by the spontaneous fission of higher mass transuranic elements.

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