The USS Arizona is still on the ocean floor of Pearl Harbor with the entire crew on board. Three days after declaring war on Japan, the U.S. declared war on Germany and Italy. [Pictured: USS Shaw exploding at Pearl Harbor, Dec. 7, 1941] 1942: War with Bulgaria, Hungary, and ...
You’ve probably heard of uranium-235 and, well, the polonium-210 that did in former KGB officer Alexander Litvinenko. The former is moderately radioactive, the latter horrendously so. But there are all sorts of stable6 isotopes, too. For example, silver comes in two of them, 107 and ...
In an unstable atom the proton/neutron balance is slightly different from its stable form, resulting in the binding energy of the nucleus being out of balance. As elements get heavier, more neutrons must exist in the nucleus to balance out proton-proton repulsion forces. For instance, uranium-...