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  • Which of the following element of Group 16 has the least negative value of first electron gain enthalpy <img alt="\mathrm{\Delta H_{eg}}" src="https://entrancecorner.oncodecogs.com/gif.latex?%

Which of the following element of Group 16 has the least negative value of first electron gain enthalpy \mathrm{\Delta H_{eg}}?

Option: 1

Oxygen


Option: 2

Sulphur


Option: 3

Selenium


Option: 4

Tellurium


Answers (1)

best_answer

Due to inter electronic repulsions in the small sized Oxygen atom, the value of first electron gain enthalpy is the least negative among other members of Group 16.

The values of first electron gain enthalpy given below:

Element Oxygen Sulphur Selenium Tellurium Polonium
\mathrm{\Delta H_{eg} (kJ mol^-)} -141 -200 -195 -190 -174

Hence, the correct answer is Option (1)

Posted by

sudhir.kumar

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