The radioactive isotope $${}_{27}^{60}$$Co which is used in the treatment of cancer can be made by (n.p) reaction. For this reaction the tarfet nucleus is

The radioistope, tritium ($${}_1^3$$H) has a half-life of 12.3 years. If the initial amount of tritium is 32 mg, how many milligrams of it would remain after 49.2 years?

$${}_{92}^{235}$$U, nucleus absorbs a neutron and distintegrate in $${}_{54}^{139}$$Xe, $${}_{38}^{94}$$Sr and $$x$$ so, what will be product $$x$$?

A human body required 0.01 m activity of radioactive substance after 24 hours. Half life of radioactive substance is 6 hours. Then inhection of maximum activity of radioactive substance that can be injected is