The correct order of magnitude of electron gain enthalpy of group-16 elements is:

Understand the Problem

The question is asking for the correct order of the electron gain enthalpy of group 16 elements, which are O, S, Se, Te, and Po. This requires knowledge of the periodic trends in electron affinity for these elements.

More Information

Electron gain enthalpy becomes more negative as you move from Po to S in Group 16 of the periodic table, hence, the correct order of electron gain enthalpy decreases as S > O > Se > Te > Po.

Tips

A common mistake is to not consider the trend of electron gain enthalpy in the periodic table, especially the impact of the small size of oxygen.

Sources

• The correct order of magnitude of electron gain enthalpy of O , S and ... - Byju's - byjus.com
• Physics Chemistry Mathematics Question 34 - AskFilo - askfilo.com
• [Solved] The correct order of decreasing electron gain enthalpy with - Testbook - testbook.com