Three elements have the electron configurations 1s22s22p63s23p5,1s22s22p63s23p64s2, and [Ar]4s23d104p2. The first ionization energies of these elements (not in the same order) are 0.761,0.590, and 1.256MJ/mol. The atomic radii are 197, 99 , and 122 pm. Identify the three elements, and match the appropriate values of ionization energy and atomic radius to each configuration