Three elements have the electron configurations 1s22s22p63s23p6, 1s22s22p63s2, and 1s22s22p63s23p64s1. The first ionization energies of these elements (not in the same order) are 0.419, 0.735, and 1.527 MJ/mol. The atomic radii are 160, 97, and 227 pm. Identify the three elements, and match the appropriate values of ionization energy and atomic radius to each configuration. Electron Configuration Element Symbol First Ionization Energy (MJ/mol) Atomic Radius (pm) 1s22s22p63s23p6 fill in the blank 6a85e4fb8008012_1 fill in the blank 6a85e4fb8008012_2 1s22s22p63s2 fill in the blank 6a85e4fb8008012_4 fill in the blank 6a85e4fb8008012_5 1s22s22p63s23p64s1