Chemical Element Si, Used for Rubber-Like Stuff
Puzzle 5 of Digital Revolution Easy Pack
Question is: Chemical Element Si, Used for Rubber-Like Stuff
and the answer is: SILICON
Word Meaning:
SILICON — (chemistry, uncountable) A nonmetallic element (symbol Si) with an atomic number of 14 and atomic weight of 28.0855.
Definitions from Wiktionary.