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 For the elements with the electron affinities given in the table in the introduction, which element is most likely to accept an electron? (N, Sr, or Br)

Question

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

For the elements with the electron affinities given in the table in the introduction, which element is most likely to accept an electron? (N, Sr, or Br) 

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Periodicity in Properties

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