promethium nel dizionario italiano Oxford-Paravia

Traduzioni di promethium nel dizionario inglese»italiano

promethium [ingl brit prəˈmiːθɪəm, ingl am prəˈmiθiəm] SOST CHIM

promethium

promezio m

promethium

prometeo m

Traduzioni di promethium nel dizionario italiano»inglese

Altre traduzioni ed espressioni tipiche contenenti il termine di ricerca

promezio

promethium

Esempi monolingue (non verificati dalla Redazione di PONS)

inglese

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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