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Classification of Elements and Periodicity in Properties — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryClassification of Elements and Periodicity in Properties1 Mark
Question
Electron gain enthalpy usually becomes less negative from top to bottom in a group.
Is there any exception to this generalisation? Comment.
✓

Answer

The $\Delta_\text{eg}\text{H}$ of N is positive while the $\Delta_\text{eg}\text{H}$ of other elements of group 15 becomes more and more negative down the group from P to Bi.

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