Which of the following has most negative value of electron gain enthalpy- S Se O Te
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Answer:
S has high electron gain enthalpy because in sulphur there is more inter-electronic repulsion than oxygen, therefore, more energy is released in case of sulphur on gaining electrons.
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Answer:
S has most negative value of electron gain enthalpy among O, S, Se, Te.
Explanation:
- The energy that is released or absorbed when a neutral atom accepts an electron in its gaseous state is called electron gain enthalpy.
- Heat released due to electron gain enthalpy would be denoted as negative.
- This is because of fairly small size of oxygen than Sulphur and hence, oxygen cannot accommodate more electrons and thus need extra energy which increases positive electron gain enthalpy.
- Also since, larger size decreases nuclear attraction, negative electron gain enthalpy decreases.
- Hence, Sulphur has most electron gain enthalpy with a negative sign among all 16 group elements.
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