Red/brown Element Derived From Brine Pools
Puzzle 7 of Periodic Table Medium Pack
Question is: Red/brown Element Derived From Brine Pools
and the answer is: BROMINE
Word Meaning:
BROMINE — (uncountable) A nonmetallic chemical element (symbol Br) with an atomic number of 35; one of the halogens, it is a fuming red-brown liquid at room temperature.
Definitions from Wiktionary.