[UPSC IFoS 2020] Nuclear Physics (Q59, 4+4=8M)

(i) Plot proton number (Z) versus neutron number (N). What is the inference from the plot with regards to light and heavy nuclides ? (ii) Which nucleus would you expect to be more stable, ^{7}_{3}\text{Li} or ^{8}_{3}\text{Li} ? Justify your answer.