Answer:
Promethium (61PM) [Xe]54 4f5 5d0 6s2
Protactinium (91Pa) : [Rn] 5f2 6d17s2
Mendelevium (101Md): [Rn] 5f13 6d0 7s2
Meitnerium (109Mt) : [Rn] 5f14 6d7 7s2
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