A) only unfilled 3d orbitals
B) unfilled 3d and 4d orbitals
C) unfilled 4d and\[4f\]orbitals
D) unfilled\[4f\]and Sd orbitals
Correct Answer: D
Solution :
Lanthanum has unfilled 4f and 5d orbitals.You need to login to perform this action.
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