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What is the correct electron configuration for an element with 5 electrons in
the 3d energy sublevel?
O A. 1s22s22p63s²3p63d
OB. 1s22s22p³3s²3p³ 4s²3d5
O C. 1s²2s22p3s²3p64s²3d
O D. 1s22s²2p63s²3p³3d5