In the radioactive decay,${}_{Z}^{A}X \to {}_{6}^{12}C + {}_{+1}^{0}e$,find the values of $A$ and $Z$.

The energy required to separate a neutron and a proton from the nucleus is called:

Who observed that when the nucleus of a uranium atom was bombarded with fast-moving neutrons,it became so unstable that it immediately broke into two nuclei of nearly equal mass,besides other fragments?

In a nuclear reactor,the chain reaction is controlled by introducing:

What is the packing fraction of $_{26}^{56}Fe$ (Isotopic mass $= 55.92066$)?

When a slow neutron goes sufficiently close to a ${^{235}U}$ nucleus,then the process which takes place is