Enter a clue or pattern or both:
The Clue
Highly reactive metal (6 letter answer)
The Answer
CESIUM
Tags
Notes
The answer CESIUM is so rare that it appears less than once every 2500 puzzles.
Related Clues
Element in photoelectric cells
Photoelectric cell component
Photoelectric cell element
Definition
CESIUM as a noun:
1. (cesium, caesium, Cs, atomic number 55) = a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal