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THE ANSWER SHOULD BE Cl . HOPE U LIKE IT.
anandtiwari0019:
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Fluorine has the highest Electronegativity so it is expected that Fluorine will have highest electron affinity, but practically it is found that chlorine have highest electron affinity.
Because fluorine has small size compare to chlorine hence when electron is added to fluorine then repulsion is more compared to chlorine hence the electron gain enthalpy decreases.
Therefore, Chlorine has highest electron affinity in the periodic table.
Because fluorine has small size compare to chlorine hence when electron is added to fluorine then repulsion is more compared to chlorine hence the electron gain enthalpy decreases.
Therefore, Chlorine has highest electron affinity in the periodic table.
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