Metallic Element Used to Coat Tungsten Filaments
This page is the CodyCross answer for the clue below from Student Life , Group 923, Puzzle 4 (Protractor).
Question is: Metallic Element Used to Coat Tungsten Filaments
and the answer is: THORIUM
Word Meaning:
THORIUM — A chemical element (symbol Th) with atomic number 90. A weakly radioactive, malleable, moderately hard silvery metal that tarnishes black when exposed to air.
Definitions from Wiktionary.