Chemistry

Problem

The photoelectron spectrum of an unknown element contains five peaks whose binding energies and areas are listed.

Which ground-state electron configuration is most consistent with this spectrum? a)

1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{2}

1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{4}

1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6}

1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{3}