Metal With Symbol Sm, Used in Magnets
Puzzle 13 of Building a House Hard Pack
Question is: Metal With Symbol Sm, Used in Magnets
and the answer is: SAMARIUM
Word Meaning:
SAMARIUM — A chemical element (symbol Sm) with an atomic number of 62, a moderately hard silvery metal that slowly oxidizes in air. Applications in human affairs include magnets with high performance at high temperatures, which are important in military equipment.
Definitions from Wiktionary.