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Promethium

nounverified·updated May 18, 2026

a soft silvery metallic element of the rare earth group having no stable isotope

Classifications

Entity Type

Unknownauthoritativeglossary_import_default_pending_classifier
?unassignedlast reviewed

Sensitivity

unclassified

Information Class

unclassified

Variants

plural
Promethiums
possessive
Promethium's
pluralpossessive
Promethiums'