The ground state electron configuration of an Al atom is:
A) 1s²2s²2p⁶3s²3d¹
B) 1s²2s²2p⁶3s²3p¹
C) 1s²2s²2p⁶3s²3p⁶4s²4p¹
D) 1s²2s²2p⁶3s²3p²

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