1s^2 2s^2 2p^6 3s^2
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[Xe]6s^24f^145d^106p^2 i think this is right. !
The ground state shorthand notation for iron (Fe) is [Ar] 3d^6 4s^2.
The electron configuration (short form) of fermium is: [Rn]5f127s2.
The electron configuration of silicon is [Ne]3s23p2.
(Xe)6s24f145d4