Element With the Symbol S, Once Called Brimstone
Puzzle 13 of Look up Easy Pack
Question is: Element With the Symbol S, Once Called Brimstone
and the answer is: SULFUR
Word Meaning:
SULFUR — (uncountable) A chemical element with atomic number 16, having a bright yellow color and characteristic smell, used commercially in a variety of products such as insecticides, black powder, and matchsticks.
Definitions from Wiktionary.