Electron affinity, EA, is the energy required to add an electron to a neutral gaseous atom and is related to an element's position on the periodic table. Electron affinities can be positive, negative, or zero, as shown in the table. Element Electron affinity (kJ/mol) N (nitrogen) >0 Br (bromine) −325 Sr (strontium) −5   Rank the following elements by electron affinity, from most positive to most negative EA value. Rank from most positive to most negative.  If any elements are equivalent, please note that.     Iodine Rubidium Krypton Bismuth Oxygen

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