Question
Write the electronic configurations of the elements with the atomic numbers $61, 91, 101,$ and $109.$
✓
Answer
| Atomic number | Electronic configuration |
| $61$ | $[Xe]^{54} \ 4f^5 \ 5d^{0 } \ 6s^2$ |
| $91$ | $[Rn]^{85} \ 5f^{13} \ 6d^1 \ 7s^2$ |
| $101$ | $[Rn]^{86} \ 5f^{13} \ 5d^{0 } \ 7s^2$ |
| $109$ | $[Rn]^{86} \ 5f^{14} \ 6d^1 \ 7s^2$ |
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