Write the electronic configurations of the elements with the atomic numbers $61$,$91$,$101$ and $109$.
(N/A) The electronic configurations are determined based on the Aufbau principle and the noble gas core notation:
| Atomic Number | Electronic Configuration |
|---|---|
| $61$ | $[Xe] \, 4f^{5} \, 6s^{2}$ |
| $91$ | $[Rn] \, 5f^{2} \, 6d^{1} \, 7s^{2}$ |
| $101$ | $[Rn] \, 5f^{13} \, 7s^{2}$ |
| $109$ | $[Rn] \, 5f^{14} \, 6d^{7} \, 7s^{2}$ |
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