When an atom breaks apart, it gives out energy and more neutrons, which can then split other atoms. Get enough atoms splitting and you have the chain reaction needed for a bomb blast ...

There are three natural isotopes of uranium — uranium-234 (U-234), uranium-235 (U-235) and uranium-238 (U-238). U-238 is the most common one, accounting for around 99 per cent of natural uranium found ...

It takes approximately 4.5 billion years – roughly the life of the Earth – for half of a given quantity of uranium-238 to decay into other elements.

A highly coveted children's toy from the 1950s is going on sale—and it contains real uranium. The Gilbert U-238 Atomic Energy Laboratory, which was released in 1950, was dubbed one of 'the 10 ...

Destroying Iran's stores of enriched uranium would bring danger for people nearby but not trigger another Chernobyl.

'Natural' uranium as found in the earth's crust is a mixture largely of two isotopes: uranium-238 (U-238), accounting for 99.3 percent and U-235 about 0.7 percent.

Although natural decay of U-235 means that this is unlikely to happen again, we humans have learned to take uranium ore and start a controlled fission process in reactors, beginning in the 1940s.

In fact, we notice that natural radioactive isotopes with the decay periods of many thousand million years (such as uranium-238, thorium-232 and samarium-148) are comparatively abundant, whereas ...

Uranium-238 (U-238) is the most abundant isotope of uranium, making up about 99.3% of natural uranium. A different isotope, ...