No. 2

At first I was surprised to find out that the metal in this picture is actually Calcium. So rare is it that I ever see Calcium outside of its mineralized form (as calcium carbonate) that I forget that Calcium in indeed a metal, and a bright and shiny one at that too when it's relatively pure. The things you learn everyday.

Source - http://www.theodoregray.com/PeriodicTable/Samples/020.2/index.s12.html