et

Pm

1 [prom`eetium] symbol

EKI Combined Dictionary 2026

Last modified 12.02.2025

Meanings

pehme hõbevalge metall, omadustelt haruldane muldmetall (lantanoid), keemiline element järjenumbriga 61
Synonyms

Translations

Good to know

Tähis Pm lähtub ladina nimetusest Promethium.

Terminological databases

EKI terminibaas Esterm

ID 732223 Last modified 17.09.2015
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Domain inorganic chemistry
promethium preferred
illinium deprecated
florentium deprecated
Pm
  • haruldaste muldmetallide hulka kuuluv radioaktiivne keemiline element, järjenr 61
  • a rare, radioactive, metallic chemical element of the lanthanide series, atomic number 61, which was first produced artificially in a nuclear reactor and is present in trace amounts as a fission product in uranium ores
promeetium
Pm symbol
promethium preferred
Good to know
  • The known uses of promethium are due to its radioactivity. Its soft beta-particle radiation can be converted to electricity in miniature batteries formed by sandwiching promethium between wafers of a semiconductor such as silicon; those batteries operate in extreme temperatures for up to five years. Other uses are as beta-radiation sources—e.g., in light sources that use phosphors to absorb beta radiation and convert it to visible light.
illinium deprecated
Good to know
  • a disused name for the element now called „promethium“
florentium deprecated
Good to know
  • a disused name for the element „promethium“
Pm symbol
prométhium
Promethium
prometium

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Pm

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