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S has more negative electron gain enthal...

S has more negative electron gain enthalpy than O why ?

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`(i) S (ii) Cl (iii) O (iv) F`
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MODERN PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -PRACTICE PROBLEMS
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  19. S has more negative electron gain enthalpy than O why ?

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  20. The electron gain enthalpies of halogens are as given below: F =- 33...

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