The electronic configuration of bivalent Europium and trivalent cerium respectively is: (Atomic Number: Xe = 54, Ce = 58, Eu = 63)

Options

A. `[Xe]4f^(7)` and `[Xe] 4^(1)`
B. `[Xe]4f^(4)` and `[Xe]4f^(9)`
C. `[Xe]4f^(2)` and `[Xe]4f^(7)`
D. `[Xe]4f^(7) 6s^(2)` and `[Xe]4f^(2)6s^(2)`

Answer

A