(Solution) - The electron affinities in kJ mol for the group -(2025 Original AI-Free Solution)

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The electron affinities, in kJ / mol, for the group 1B and group 2B metals are

(a) Why are the electron affinities of the group 2B elements greater than zero?
(b) Why do the electron affinities of the group 1B elements become more negative as we move down the group?