Electron affinity is referred as an essentially the opposite of the ionization energy: Instead of taking away an electron from the element we can add an electron to the element to create an anion.
M + e - - - -> M – E.A.
Basically, the energy which results from this process is negative or close to zero. The more negative this energy the more this method is preferential
The electron affinity is determined of the energy change when an electron is added to a neutral atom to form a negative ion. Best example, whenever a neutral chlorine atom in the gaseous form plucks an electron to form a Cl- ion, it releases energy of 349 kJ/mol or 3.6 eV/atom. To have an electron affinity of -349 kJ/mol & this large number indicates that it forms a stable negative ion. Small numbers indicate which is a less stable negative ion is formed. Group VIA & VIIA in the periodic table have the largest electron affinities.
In our next blog we shall learn about sp hybridization I hope the above explanation was useful.Keep reading and leave your comments.
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