defence exam ITBP (Telecommunication) Head Constable Mock Test 2024 Chemistry Classification of Elements and Periodicity in Properties Periodic Table
The electronic configuration of gadolinium (Atomic number 64) is
1
[Xe] 4f3 5d5 6s2
2
[Xe] 4f7 5d2 6s1
3
[Xe] 4f7 5d1 6s2
4
[Xe] 4f8 5d6 6s2