Enter a clue or pattern or both:

The Clue

Element #99 (11 letter answer)

The Answer

EINSTEINIUM

Tags


Notes

The answer EINSTEINIUM is so rare that it appears less than once every 2500 puzzles.

Definition

EINSTEINIUM as a noun:

1. (einsteinium, Es, E, atomic number 99) = a radioactive transuranic element produced by bombarding plutonium with neutrons