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Meaning of radioactinium | Babel Free

Noun CEFR C1

Definitions

The radioactive isotope of actinium, ²²⁷₈₉Ac, having a half-life of 21.7 years

uncountable

Equivalents

Français radioactinium

CEFR level

C1

Advanced
This word is part of the CEFR C1 vocabulary — advanced level.

See also

radioactivating radioactivation Radioactive radioactive dating radioactive decay radioactive disintegration