← Back to search

Meaning of eka-protactinium | Babel Free

Noun CEFR C2

Definitions

unbitrium (Ubt), an unsynthesized chemical element with atomic number 123.
uncountable
unquadunium (Uqu), an unsynthesized element with atomic number 141.
uncountable

CEFR level

C2

Mastery
This word is part of the CEFR C2 vocabulary — mastery level.

See also

eka-radium eka-radon eka-rhenium eka-silicon eka-tantalum eka-thallium