Described uranium (a type of nuclear fuel)

Uranium are being used as nuclear fuel as it easily split away the atoms.

Explanation:

Uranium are generally used as fuel for nuclear fission reaction in the nuclear power plants. They use U-235 as fuel, as it can split away the atoms easily. Other than silver, uranium is more common but its availability is very low. i. e. only 0.7%. when U-235 absorbs neutron, it undergoes nuclear fission. The heavy nucleus gets splitted over two or even more lighter nuclei, along with release of kinetic energy, gamma rays and also some free electrons.