If an element has a negative electron affinity, the -1 anion is more stable that the neutral atom.

Question

BlackTom AI · Accepted Answer

Begin by identifying what the statement is claiming about electron affinity (EA) and stability of an anion.
Option 1: True. The claim that a -1 anion is more stable than the neutral atom when the element has a negative electron affinity is the core assertion here. If EA is negative, it means that adding an electron to the neutral atom would require energy input rather than release energy; the system would not favor formation of the anion. In terms of stability, a negative EA indicates that the neutral atom is more stable than its anion, because the process of forming the anion is not energetically favorable. This makes the assertion in Option 1 incorrect.
Option 2: False. Since a negative electron affinity signifies that extra energy must be supplied to attach an electron, the resulting anion is not energetically favored relative to the neutral atom. Therefore, the -1 anion is not more stable than the neutral atom; the neutral atom remains comparatively more stable under these conditions. This aligns with the general interpretation of negative EA values as unfavorable for anion formation and confirms that the statement in the question is not correct.
To recap, the key concept is that electron affinity measures the energy change when adding an electron to a neutral atom. A negative value implies the process is endothermic, disfavoring anion formation, and thus the neutral atom is more stable than the -1 anion in such cases.

If an element has a negative electron affinity, the -1 anion is more stable that the neutral atom.判断题

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