Element Ra Discovered by Marie Curie in 1898
Puzzle 3 of Patterns in Nature Pack
Question is: Element Ra Discovered by Marie Curie in 1898
and the answer is: RADIUM
Word Meaning:
RADIUM — The chemical element (symbol Ra) with an atomic number of 88. It is a soft, shiny and silvery radioactive alkaline earth metal.
Definitions from Wiktionary.