Questions tagged [electron-affinity]
The amount of energy released when an electron is added to a species in the gaseous phase to form a negative ion. Not to be confused with [ionization-energy].
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Using electron affinity to calculate lattice energy
I am trying to calculate the lattice energy of $\ce{CaBr2}$, I am uncertain of how to incorporate the electron affinity value provided for $\ce{Br2}$ into my calculation.
Since electron affinity is ...
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For group 7 elements, are anions a lower energy state than being neutral atoms?
Given that electron affinity is positive, why don't these atoms attract free electrons and "prefer" to exist as anions? Never made sense to me — I could be missing something obvious.
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Can we add an electron to an atom?
Say that we have an atom which is inert, or stable. How would one go about adding one electron. Is it possible?
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Ionization energy and Electron Affnity
Which of the following statements correctly interprets the relationship between ionization energy, atomic radius Electron affinity when comparing two atoms.
The correct choice as per my instructor ...
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Which element has a greater second electron affinity, sulfur or oxygen?
I found a question asking the above which states that sulfur has a lesser second electron affinity than oxygen. But since the inter-electronic repulsion in sulfur is lesser, shouldn't it be willing to ...
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Electron affinities of the chalcogens and halogens
Here are the electron affinities of the 16th and 17th groups.
The general trend for electron affinity down the group is that it decreases because of the increase in atomic radius.The exception of $\...
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Why is electron gain generally exothermic?
I understand that we need to supply energy to counter the nuclear attraction when we remove electrons, and that is the reason why ionization energy is endothermic. However, why does an atom release ...
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is it possible to break the bonds of diatomic elements such as fluorine or iodine and create positive and negative ions by electron bombardment?
If I had a container in vacuum filled with $\ce{I2}$ gas and then I bombarded it with high speed electrons using an electron gun, would be able to get both $\ce{I+}$ and $\ce{I-}$ ions or would I ...
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While electrolyzing concentrated aqueous sodium chloride, why is it that chlorine is discharged but not sodium?
Hydrogen and hydroxide both exceed sodium and chlorine in terms of reduction and oxidation potential respectively.
While electrolyzing a concentrated solution of aqueous NaCl, it is known that ...
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Second electron affinity of sulfur and oxygen
Why is the second electron affinity of oxygen greater than that of sulfur?
I think it should be like- second electron gain enthalpy of oxygen should be greater than the sulfur but electron affinity ...
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Ca energy release when gaining an electron
Why does $\ce{Ca}$ have a negative electron affinity, i.e. energy is released when it gets an electron (ca. $\pu{-2 kJ/mol}$), when $\ce{Be}$ and $\ce{Mg}$ have positive values?
I know that the ...
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Why does K have a greater electron affinity than Ca?
Why will $\ce{K}$ have a greater electron affinity than $\ce{Ca}$? I know that $\ce{Ca}$ has a greater first ionization energy, and I also know that $\ce{K}$ has a greater second ionization energy, ...
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Which atom goes in the middle of a lewis dot structure?
I've read online in multiple sites that the least electronegative atom goes in the middle with the exception of H, which always goes on the outside.
However, in the molecule NaCN, C is in the middle. ...
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Is there a relation between the ionization energy and the electron affinity?
I am aware of the definition and equation of IE and EA. I was wondering if there is a direct relation between this two quantities with the energy of the neutral specie.
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Electron Affinity trends
Imagine an arrangement of atomic orbitals in an alternate universe, in which the s subshell contains 2 orbitals instead of 1, and the p subshell contains 4 orbitals rather than 3. In which groups ...
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Why does chlorine have a higher electron affinity than fluorine?
Since fluorine has its valence electrons in the n=2 energy level, and since chlorine has its valence electrons in the n=3 energy level, one would initially expect that an electron rushing towards ...
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Why does oxygen not like to be a double anion?
The electron affinity of a neutral oxygen atom is −142 kJ (it releases this energy). The electron affinity for the now double anion $\ce{O^2-}$ is 710 kJ (work must be done on the atom).
My question ...
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Why is there not a strict correspondence between electronegativity and ionic character?
Why is the Electronegativity difference for atoms in bonding uncertain while determining what the compound will be?
According to the IB(International Baccalaureate) they say that the ...
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List in order of increasing radius
List in order of increasing radius:
a) Rb, K, C5, Kr
For this one I got C, Kr, K, Rb
b) Ar, Cs, Si, Al
This I got: Ar, Si, Al, Cs
Does anyone know if this is correct? I don't have the solution ...
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What determines the electronegativity of an element?
Is it possible to work out without post-Bohrian mathematics?
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Why does cesium have a positive electron affinity?
When an electron is added to cesium, why is energy released?
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Are there any major exceptions when comparing electron affinity?
I was tasked with figuring out whether carbon or nitrogen has a more negative electron affinity value. I initially picked nitrogen, just because nitrogen has a higher $Z_\mathrm{eff}$, creating a ...
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