Which of the following elements have the high | vedclass

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(B) Electron gain enthalpy is the energy released when an electron is added to a neutral gaseous atom.Chlorine $(Cl)$ has the highest negative electro

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$Cl, F$

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(B) Electron gain enthalpy is the energy released when an electron is added to a neutral gaseous atom.Chlorine $(Cl)$ has the highest negative electron gain enthalpy among all elements due to its small size and high effective nuclear charge,which allows for strong attraction of the incoming electron.Fluorine $(F)$ has a lower electron gain enthalpy than chlorine because of its very small size,which leads to significant inter-electronic repulsions between the incoming electron and the existing electrons in the $2p$ subshell.Therefore,$Cl$ has the highest and $F$ has the lowest electron gain enthalpy among the given options.

Which of the following elements have the highest and lowest electron gain enthalpy,respectively?

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