The difference between electron gain enthalpies will be maximum between
- Ne and F
- Ne and Cl
- Ar and Cl
- Ar and F
The Correct Option is B
Solution and Explanation
Solution: Difference in Electron Gain Enthalpy
Electron gain enthalpy refers to the energy change that occurs when an electron is added to an isolated gaseous atom to form a gaseous ion.
Explanation:
- Neon (Ne): Neon is a noble gas with a completely filled electronic configuration (1s2 2s2 2p6).
- It has a stable structure, and adding an electron would require placing it in the higher energy 3s orbital.
- As a result, the electron gain enthalpy of Neon is highly positive because energy is absorbed rather than released.
- Chlorine (Cl): Chlorine is a halogen with the electronic configuration (1s2 2s2 2p6 3s2 3p5).
- It has a high tendency to gain an electron to achieve a stable noble gas configuration (3p6).
- The electron gain enthalpy of chlorine is highly negative, as energy is released when it gains an electron.
Conclusion: The difference in electron gain enthalpy between Neon and Chlorine is maximum because:
- Neon has a highly positive electron gain enthalpy.
- Chlorine has a highly negative electron gain enthalpy.
This contrast makes the difference in electron gain enthalpies largest between Neon (Ne) and Chlorine (Cl).
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