Question

Rank the following from highest to lowest electron affinity

A. Li, F, C

B. Ar, Cl, S

Answer 1

Electron affintiy is the energy released when an electron is released
X+ e- --> X-
across the period electron affinity increases in the periodic table.This is because
increase in effective nuclear charge across the period.except noble gases.for noble gases
effective =nuclear charge to the newly added electron is zero

Li, F,C
from highest to least electron affinity :::
F > C > Li
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Ar,Cl, S

Cl > S > Ar
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thank you