Question

Uranium-235 has an unstable nucleus. Which type of nuclear decay will Uranium-235 undergo?

alpha
beta minus
beta plus
gamma

Answer 1

Uranium-235 primarily undergoes **alpha decay**. In this process, it emits an alpha particle, which consists of 2 protons and 2 neutrons, leading to the formation of a different element (in this case, thorium-231). While beta decay can also occur in uranium isotopes under certain conditions, alpha decay is the most common mode for Uranium-235.