Question: Three elements have the electron configurations 1s22s22p63s23p6 1s22s22p63s2 and 1s22s22p63s23p64s
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 1.60, 0.98, and 2.35 Å. Identify the three elements, and match the appropriate values of ionization energy and atomic radius to each configuration.
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