Promethium
nounverified·updated May 18, 2026
a soft silvery metallic element of the rare earth group having no stable isotope
Classifications
Entity Type
Unknown—glossary_import_default_pending_classifier
?unassignedlast reviewed —
Sensitivity
unclassified
Information Class
unclassified
Variants
- plural
- Promethiums
- possessive
- Promethium's
- pluralpossessive
- Promethiums'