Which of the following represents the electron configuration of a silver atom, and the electron configuration of silver ion, respectively? Select one: a. [Ar] 5s2 4dº and [Kr] 5s" 4d9 b. [Ne] 3s 3p2 and [Ne] 3s 3p2 O C. [Kr] 5s 4010 and [Kr] 4d10, respectively O d. [Ar] 5s 4d10 and [Ar] 582 4d9 O e. [Kr] 5s 4dº and [Kr] 5s2 4dº