How does #"electron gain enthalpy"# evolve with respect to the Periodic Table?
Elements with high nuclear charge, i.e from the right hand side of the Periodic Table as we face it, tend to have high electron affinities (i.e. highly negative, because the reaction as written is exothermic).
And electronegativity, is conceived to be the tendency of an atom involved in a chemical bond to polarize electron density towards itself. There are various scales, of which the Pauling scale was the earliest, and still most widely used.
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