Which of the following is expected electronic configuration of europium ?

Options

A. `6s^(2), 4f^(7), 5d^(0)`
B. `6s^(2), 4f^(6)5d^(1)`
C. `6s^(2), 4f^(14), 5d^(0)`
D. `6s^(2), 4f^(13),5d^(1)`

Answer

B

Explanation

We know that, Europium has atomic number 63 habing expected electronic configuration is `6s^(2), 4f^(6), 5d^(2) and ` observed electronic configuration is `6s^(2), 4f^(7), 5d^(0)`