Yttrium (it-ree-əm) is
a chemical element with symbol Y and it has an atomic number
of 39. It has an atomic mass of 88.90585.
Things you might not know about
Yttrium:
- About 31 ppm of the Earth's crust is
yttrium, making it the 28th most abundant element there, and 400
times more common than silver.
- Yttrium is one of the elements used to make
the red color in CRT televisions.
- The radioactive isotope yttrium-90 is used in
drugs for the treatment of various cancers, including lymphoma,
leukemia, ovarian, colorectal, pancreatic, and bone cancers.
See GC2XAY2 - Hydrogen, for an explanation
about this series of caches.