Which uranium atoms undergo fission readily?

Which uranium atoms undergo fission readily?

کون سا یورینیم ایٹم آسانی سے فیوژن سے گزرتا ہے؟
Explanation

Uranium-235 (U²³⁵) is a fissile isotope, meaning it readily undergoes nuclear fission when struck by a neutron.

It is commonly used in nuclear reactors and atomic bombs for this reason.