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A gas phase atom with the electronic configyartin
`1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)3d^(6)`
loses three electrons ,what is the electron configuration of the resulting gas phase ion ?
A. `1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(5)`
B. `1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(1)3d^(4)`
C. `1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)3d^(3)`
D. `1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(1)3d^(5)`

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