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Which metal has the most negative electron affinity and why?

Which of the following elements has the most negative electron affinity?

  • Which of the following elements has the most negative electron affinity? S Si P Se

  • Answer:

    Sulfur (S) has 16 electrons and therefore 6 in its valence shell. Silicon (Si) has 14 electrons and therefore has 4 in its valence shell. Phosphorous (P) has 15 electrons and therefore has 5 in its valence shell. Selenium (Se) has 34 electrons and therefore has 6 in its valence shell. Therefore, the element from this list that is most likely to give up an electron is Silicon.

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