I know some of nuclear reactions. It is very interesting and unbelievable when elements changes. So U235+neutron = BOOM and Kr + Ba + neutron then chain reaction (atomic bomb) this may watch on USSR's educational film. Then: Uran - electron = Np. Also other chains may watch on Pediwikia=) May be problem, because elements changes all over Mendeleev's table - it need all elements in Powder Toy
@KIRILL(View Post) Uranium - electron is still Uranium. You may mean proton but even then, Uranium - proton wouldn't make Neptunium. It would need to gain one, so probably by undergoing beta decay to achieve it.