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Atomic number of Mn is 25 what is the electronic configuration in the ground state________________?

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Atomic number of Mn is 25 what is the electronic configuration in the ground state________________?

A. 1s2 2s2 2p6 3s2 3p6 3d7
B. 1s2 2s2 2p6 3s2 3p6 4s2 4p5
C. 1s2 2s2 2p6 3s2 3p5 3d10
D. 1s2 2s2 2p6 3s2 3p6 4s23d5