Ele072 - Hafnium - (Elements Series) Traditional Cache

Hafnium (haf-nee-əm) is a chemical element with the symbol Hf and it has an atomic number of 72.  The atomic weight is 178.49. 

Things you might not know about Hafnium:

1. Hafnium reserves are projected to last under 10 years if the world population increases and demand grows.
2. Most of the hafnium produced is used in the production of control rods for nuclear reactors.
3. Hafnium is also used as the electrode in plasma cutting because of its ability to shed electrons into air.

See GC2XAY2 - Hydrogen, for an explanation about this series of caches.