eka-protactinium

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English[edit]

Noun[edit]

eka-protactinium (uncountable)

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Wikipedia

  1. Unbitrium (Ubt), an unsynthesized chemical element with atomic number 123.
  2. Unquadunium (Uqu), an unsynthesized chemical element with atomic number 141.

Usage notes[edit]

  • 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.