Answer:
Explanation:
Niobium has an anomalous ground-state electron configuration for a Group 5 element: [Kr] 5sĀ¹4dā“ . IT is anomalous because in normal course , it should have been [Kr] 5sĀ²4dĀ³ Or [Kr] 5sā°4dāµ . It is so because 5s subshell
has lesser energy than 4d subshell , Ā or half filled 4d subshell is more stable. But the stable configuration is [Kr] 5sĀ¹4dā“ . It is so because the energy gap between 5s and 4d is very little. So one electron of 5sĀ² gets Transferred to 4d subshell. Ā This paramagnetic behavior is confirmed by its dipole moment , equivalent to 5 unpaired electrons.
