The electronic configuration of the last element of the volatile metal group is:
- A$[Rn] \ 5f^{14} \ 6d^{10} \ 7s^2$
- B$[Xe] \ 4f^{14} \ 5d^{10} \ 6s^2$
- C$[Rn] \ 5f^{14} \ 6d^1 \ 7s^2$
- D$[Xe] \ 4f^{14} \ 5d^1 \ 6s^2$
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