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Chemistry · Classification of Elements and Periodicity in Properties
हिन्दीConsider the electron addition process \( X(g) + e^- \rightarrow X^-(g) \). Based on Table 3.7 data, which of the following elements has the highest negative electron gain enthalpy (\( \Delta_{eg}H \))?
Correct answer · Option 2
\( \text{Cl} \text{ (Group 17)} \)
Explanation
Chlorine (Cl) has the most negative electron gain enthalpy (\( -349 \text{ kJ mol}^{-1} \)) in the periodic table due to interelectronic repulsion in the compact 2p orbital of fluorine.
