Which of the following will have the most negative electron gain entha

1.	Which of the following will have the most negative electron gain enthalpy
Answer» Electron gain enthalpy generally becomes more negative across a period as we move from the left to the right. Within a group,m electron gain entahlpy becomes less negative down a group. However, adding an electron to the\xa02p2p-orbital leads to the greater repulsion than adding an electron to the larger\xa03p3p-orbital. Hence, the element with the most negative electron gain enthalpy is chlorine, and the one with the least negative electron gain enthalpy is phosphorus.

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