Chapter : 7. Periodic Classification of Element
Variation down the Group
Variation down the Group :
Electron affinity goes on decreasing down the group in general.
Reason : Due to the increase in atomic size, the force of attraction between the nucleus and the electron to e added becomes less.
Variation along a Period : Electron affinity increase from left to right in period.
Reason : It is due to decrease in atomic size which leads to an increase in the force of attraction between the nucleus and the electrons to be added.
Example :
However, deviations to this rule are observed in variation of electron affinity.
Electron affinity goes on decreasing down the group in general.
Reason : Due to the increase in atomic size, the force of attraction between the nucleus and the electron to e added becomes less.
Variation along a Period : Electron affinity increase from left to right in period.
Reason : It is due to decrease in atomic size which leads to an increase in the force of attraction between the nucleus and the electrons to be added.
Example :
However, deviations to this rule are observed in variation of electron affinity.
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