Periodic Trends in Relative Electron Affinity Electron affinity, EA, is the ener

Question

Periodic Trends in Relative Electron Affinity 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. For the elements with the electron affinities given in the table in the introduction, which element is most likely to accept an electron? Rank the following elements by electron affinity, from most positive to most negative EA value. Rank from most positive to most negative. To rank items as equivalent, overlap them. Ionization Energy, Electron Affinity, and Enthalpy The following reaction can be written as the sum of two reactions, one of which relates to ionization energy and one of which relates to electron affinity: Na(g) + Cl(g) rightarrow Na1 (g) + Cl- (g) What is the reaction that corresponds to the first ionization energy of sodium, Na? Express your answer as a chemical equation. What is the reaction that corresponds to the electron affinity of chlorine. Cl? Express your answer as a chemical equation. This question will be shown after you complete previous question(s).

Explanation / Answer

Periodic trends in relative electron affinity

(A) The answer is: S

The elements most likely to accept an electron has the most negative electron affinity

(B) The answer is:

(most positive) argon potassium antimony sulfur bromine (most negative)

Ionization energy, electron affinity, and enthalpy

(A) Na(g) => Na+(g) + e-

(B) Cl(g) + e- => Cl-(g)

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