Eka-protactinium
Full definition of eka-protactinium
Noun
eka-protactinium
(uncountable)- Unbitrium (Ubt), an unsynthesized chemical element with atomic number 123.
- Unquadunium (Uqu), an unsynthesized chemical element with atomic number 141.
Usage notes
The prefix eka- is used to name predicted but undiscovered elements by specifying the known element above them in the same group of the periodic table.