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Meaning of eka-protactinium | Babel Free

Noun CEFR C2

Definitions

  1. unbitrium (Ubt), an unsynthesized chemical element with atomic number 123.
    uncountable
  2. 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 all C2 English words →

See also

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

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