Uranium (U) is a naturally occurring radioactive element that has no stable
isotopes but two primordial isotopes (uranium-238 and uranium-235) that have
Uranium in its pure form is a silver-colored heavy metal that is nearly twice as
dense as lead. In nature, uranium atoms exist as several isotopes: primarily ...
Natural uranium as found in the Earth's crust is a mixture largely of two isotopes:
uranium-238 (U-238), accounting for 99.3% and uranium-235 (U-235) about ...
Naturally occurring uranium consists of three isotopes: uranium-234, uranium-
235 and uranium-238. ... Methods also exist for concentrating uranium-235.
Dec 15, 2013 ... In fact, its very long half-life (and thus low radioactivity) is the reason uranium still
exists on the Earth. Three additional isotopes of uranium are ...
About a dozen other isotopes of uranium have been made artificially. ... Today,
over 400 nuclear power plants exist worldwide, producing about 17 percent of all
Jul 9, 2015 ... This radioactive metal is unique in that one of its isotopes, uranium-235, is the
only naturally occurring isotope capable of sustaining a nuclear ...
There are 27 known isotopes of uranium ranging in atomic weights 217–219, ...
The heavier “transuranic” elements are either man-made or they exist only as ...
When present in compounds, uranium exists mostly in oxidation state IV and
oxidation state ... All isotopes of uranium are radioactive, some more so than
When a neutron strikes the nucleus of an atom of the isotopes uranium 235 or
plutonium-239, it causes that nucleus to split into two fragments, each of which is