There's not much to tell you about this site except that it's a word game where you control the players. If you really want to get invested in this site, read one of the top story games or (my personal favorite) one of the homo perfectus series. Other than that enjoy... Also, italics means your character is thinking to him/herself or recalling what someone said.
Plutonium-239 is a fissionable isotope and can be used to make a nuclear fission bomb similar to that produced with uranium-235. The bomb which was dropped at Nagasaki was a plutonium bomb. Not enough Pu-239 exists in nature to make a major weapons supply, but it is easily produced in breeder reactors.
Famous scientist Enrico Fermi claimed he discovered element 94 in 1934, but it turned out to be a mixture of other elements including barium and krypton.