A partial photoelectron spectrum of an unknown second-period element shows only two…

CHEMISTRY · Single correct · AP · Chemistry · Atomic Structure and Properties · Atomic Structure and Properties

Problem

A partial photoelectron spectrum of an unknown second-period element shows only two peaks in the valence region. • Peak A (lower binding energy) has a relative area of 6. • Peak B (higher binding energy) has a relative area of 2. Which valence-shell electron configuration best matches the spectrum? (a)

2s^{2} 2p^{2}

(b)

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

(c)

2s^{2} 2p^{6}

(d)

2s^{2} 2p^{4}

Related theory

Electronic Configuration
Atomic Structure

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