Enter a clue or pattern or both:
The Clue
Element in many semiconductors (7 letter answer)
The Answer
GALLIUM
Tags
Notes
The answer GALLIUM is so rare that it appears less than once every 2500 puzzles.
Definition
GALLIUM as a noun:
1. (gallium, Ga, atomic number 31) = a rare silvery (usually trivalent) metallic element; brittle at low temperatures but liquid above room temperature; occurs in trace amounts in bauxite and zinc ores