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Electron affinity Original Scenario-Based Practice

Chemistry · The Periodic Table · Chemistry · Periodic Trends

1 Chemistry practice questions on Electron affinity. Questions built around original scenarios.

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  1. 1.

    An interstellar exploration vessel in the Orion Spur harvests power by directing neutral gaseous halogen atoms into a collector chamber where each captures an ambient free electron. Sensor telemetry indicates that neutral chlorine gas releases measurably more energy per mole during electron capture than neutral fluorine gas. Which statement correctly accounts for this observed difference in electron affinity between the two halogens?

    • A) Fluorine requires the added electron to occupy the higher-energy 3s3s subshell, making the process endothermic compared to chlorine.
    • B) Chlorine possesses a smaller atomic radius than fluorine, allowing the incoming electron to experience a stronger nuclear pull.
    • C) Increased core shielding in chlorine completely eliminates interelectronic repulsion, allowing its nucleus to bind the electron without resistance.
    • D) The compact 2p2p subshell of fluorine causes severe electron-electron repulsion that diminishes the net energy released, whereas chlorine's larger 3p3p subshell minimizes this repulsion.

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