no. but uranium-239 is the most useful and it is very rare.
Uranium is a not a so rare material !
yes
Polonium is an extremely rare chemical element, accompanying uranium ores; approx. 100 micrograms of polonium in one to (t) of uranium ore.
No Its a Actinolds, aka rare earth element
Yes,well and truly it was.In fact,a uranium bomb is one of a rare bomb made.
all isotopes of uranium have 92 protons, that is what makes them uranium.
Oh, fortunately no (excepting some rare accidents !!).
uranium, rare earth elements, and... YO MAMA!
Uranium
Uranium
In a pure sample, one (uranium itself). In ores, traces of lead, thorium and rare earth elements are usually present.