Electron gain enthalpy: positive value or most negative value among given elements

This type of question, asked 3 times: 14 May 2024 S2, 20 Apr 2026 S1, 12 May 2026 S1. All 3 questions below, oldest first.

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Question 1
14 May 2024 S2
99 $Identify the element having positive electron gain enthalpy.$
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Question 2
20 Apr 2026 S1
3 $Which element from following has positive electron gain enthalpy?$
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Question 3
12 May 2026 S1
4 $Which of the following elements of group 17 has the highest negative electron gain enthalpy?$
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