To which of the following atoms is the attach | vedclass

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(A) The difficulty of electron attachment is related to the electron gain enthalpy. $A$ positive or very low negative electron gain enthalpy indicates

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Radon

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(A) The difficulty of electron attachment is related to the electron gain enthalpy. $A$ positive or very low negative electron gain enthalpy indicates that the process is difficult.$A)$ Radon $(Rn)$ is a noble gas with a stable,fully filled valence shell configuration: $[Xe] 4f^{14} 5d^{10} 6s^2 6p^6$. It has no tendency to accept an electron,making the process highly endothermic and most difficult.$B)$ Nitrogen $(N)$ has a half-filled $2p$ subshell: $[He] 2s^2 2p^3$. This provides extra stability,making electron attachment difficult,but less so than for a noble gas.$C)$ Oxygen $(O)$ has a $2p^4$ configuration and readily accepts an electron to achieve a more stable state.$D)$ Radium $(Ra)$ is an alkaline earth metal with a $7s^2$ configuration. While it has a low electron affinity,it is still more likely to accept an electron than a noble gas.Therefore,the attachment of an electron is most difficult for Radon.

To which of the following atoms is the attachment of an electron most difficult?

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