Describe Electron Affinity? ??
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↪Electron Affinity↩
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The electron affinity of an atom or molecule is the propensity for that particle to gain an electron. This is an exothermic process for all non-noble gas elements.
There are general trends in electron affinity across and down the periodic table of elements. Electron affinity generally increases across a period in the periodic table and sometimes decreases down a group.
These trends are not necessarily universal.
The chemical rationale for changes in electron affinity across the periodic table is the increased effective nuclear charge across a period and up a group.
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