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According to these electron configuration, which element in group 15 would have the largest atomic radius?

A. [Ne] 3s^2 3p^3
B. [He] 2s^2 2p^3
C. [Ar] 4s^2 3d^10 4p^3
D. [kr] 5s^2 4d^10 5p^3
E. [Xe] 6s^2 4f^14 5d^10 6p^3