The table below shows some information about element I, II, III and IV which are in the same group of periodic table. Use the information to answer the questions that follows Element First ionization energy Kj/mole I II III IV 520 500 420 400 Atomic radius (nm) 0.15 0.79 0.23 0.25 State and explain the relationship between the variation in the first ionization energies and the atomic radii. (3 mks)