Uranium-234 is a naturally occurring isotope of uranium, with an atomic mass of 234. It is a decay product of uranium-238 and is part of the uranium decay series. Uranium-234 is present in very small amounts in natural uranium, typically around 0.0055% of the total. This isotope is radioactive, with a half-life of about 245,500 years, meaning it takes that long for half of a sample to decay. Uranium-234 can be used in various applications, including nuclear power generation and scientific research, but its low abundance makes it less commonly utilized than other isotopes like uranium-235.