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Periodic Trends: Electron Affinity Exceptions

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Wize University Chemistry Textbook > Periodic Table Trends

Electron Affinity Trend

4 Activities

An exception to the periodic trend for electron affinity, Carbon actually has a higher electron affinity than Nitrogen. This phenomenon is best explained by which of the following statements?
More Electron Affinity Trend Questions:
Electron Affinity, periodic trend
Choose the element with the more exothermic electron affinity from each pair:
1. S, Mg; 2. B, S; 3. Si, P; 4. Br, Ga.
Electron Affinity
Choose the element with more exothermic EA from each pair
Electron Affinity
Which of the following species releases the least energy when an electron is added to it?
Electron Affinity
Which of the following atoms will have a positive electron affinity.
Electron Affinity
Which of the following atoms will have a positive electron affinity.
Periodic Trends: Electron Affinity
For most elements, the first electron affinity is negative; however, a few elements have a positive first electron affinity. Which of the following atoms would have a positive first electron affinity?
Periodic Trends: Electron Affinity
Why is the electron affinity of P less negative than either Si or S? That is, why is adding an electron to a neutral phosphorous (P) atom less exothermic (less favourable) than adding an electron to a silicon or
sulphur atom?
Periodic Trends: Electron affinity
The trend of electron affinity on the periodic table is to from top to bottom and
from left to right
Electron Affinity
Which of the following has the lowest electron affinity?
"The Periodic Table", image retrieved from Chemistry 2e (https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/Chemistry2e-OP_QCzV58S.pdf) by Flowers, P et al., is licensed under CC BY.
Which of the following has the highest electron affinity?
N N+ N-
"The Periodic Table", image retrieved from Chemistry 2e (https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/Chemistry2e-OP_QCzV58S.pdf) by Flowers, P et al., is licensed under CC BY.
Rank the following atoms/ions in order of increasing electron affinity: Cl, Cl-, Mg.
Periodic Trends: Electron. Affinity
Considering the electron affinity of the atoms involved, for which reaction is the electron affinity not exothermic?
A. S(g)+e−→S−(g)S(g)+e^-\rightarrow S^-(g)
B. Si(g)+e−→Si−(g)Si(g)+e^-\rightarrow Si^-(g)
Periodic Trends: Electron Affinity
An exception to the periodic trend for electron affinity, Carbon actually has a higher electron affinity than Nitrogen. This is because:
Why does nitrogen have a positive electron affinity? (i.e. How do we rationalize the fact that it is energetically unfavourable for an N atom to accept an electron when it is energetically favourable for C and O to do so?)
Periodic Trends: Electron Affinity
The electron affinity for Ge is -118.94 kJ/mol while the electron affinity for Al is -41.76 kJ/mol. The atomic property that best explains this difference in electron affinity is:
like Winter 2014 MT1
Which equation describes the electron affinity of Bromine?