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Photoelectron spectroscopy Transitional Reasoning Practice

Chemistry · Atomic Structure · Chemistry · Electrons in Atoms

1 Chemistry practice questions on Photoelectron spectroscopy. Questions that build towards applied reasoning.

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  1. 1.

    A neutral atom of an unknown element in its ground state produces a photoelectron spectrum displaying three distinct peaks with binding energies of approximately 67.2 MJ/mol, 3.88 MJ/mol, and 1.68 MJ/mol, possessing integrated peak areas in a 2 : 2 : 3 ratio in order of decreasing binding energy. Based on this photoelectron spectroscopy data, which statement correctly identifies the element and accounts for the peak observed at 1.68 MJ/mol?

    • A) Carbon, because the peak represents two electrons removed from the highest-energy valence subshell.
    • B) Boron, because the lowest binding energy always corresponds to three equivalent valence electrons in the outermost shell.
    • C) Nitrogen, because the peak corresponds to three electrons in the 2p2p subshell, which experience greater shielding and are furthest from the nucleus.
    • D) Oxygen, because the lowest binding energy peak corresponds to unpaired electrons experiencing maximum interelectronic repulsion.

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