Ncert Exercises & Solutions

The electronic configuration of gadolinium (atomic number of 64) is:

1. $[Xe] 4 f^{3} 5 d^{5} 6 s^{2}$

2. $[Xe] 4 f^{7} 5 d^{2} 6 s^{1}$

3. $[Xe] 4 f^{7} 5 d^{1} 6 s^{2}$

4. $[Xe] 4 f^{8} 5 d^{6} 6 s^{2}$