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28 Αυγ 2023 · Electron affinity increases (becomes more negative) from left to right within a period. This is caused by the decrease in atomic radius. Electron affinity decreases (becomes less negative) from top to bottom within a group.
- Electron Affinity
Electron affinity is defined as the change in energy (in...
- 7.5: Electron Affinities
The chlorine atom has the most negative electron affinity of...
- Electron Affinity
30 Ιαν 2023 · Electron affinity is defined as the change in energy (in kJ/mole) of a neutral atom (in the gaseous phase) when an electron is added to the atom to form a negative ion. In other words, the neutral atom's likelihood of gaining an electron.
The electron affinity is the potential energy change of the atom when an electron is added to a neutral gaseous atom to form a negative ion. So the more negative the electron affinity the more favourable the electron addition process is.
The chlorine atom has the most negative electron affinity of any element, which means that more energy is released when an electron is added to a gaseous chlorine atom than to an atom of any other element:
In certain circumstances, the electron affinity may become negative. [7] Often negative electron affinity is desired to obtain efficient cathodes that can supply electrons to the vacuum with little energy loss.
2 Μαρ 2019 · Electron affinity is the amount of energy required to detach one electron from a negatively charged ion of an atom or molecule. It is indicated using the symbol Ea and is usually expressed in units of kJ/mol.
As we travel down groups, electron affinities become more negative, meaning the process is more endothermic. Electron proximity to these respective nuclei also influences this phenomenon, but contrary to the previous trend, electrons are placed in higher energy levels.
