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NEET
Exam
NEET
Subject
Chemistry
Chapter
Classification of Elements and Periodicity in Properties

NEET · Chemistry · Classification of Elements and Periodicity in Properties

How does electron-electron repulsion affect the electron gain...

How does electron-electron repulsion affect the electron gain enthalpy of oxygen and fluorine compared to sulfur and chlorine?

Options

  1. AIt increases the electron gain enthalpy of oxygen and fluorine.
  2. BIt decreases the electron gain enthalpy of oxygen and fluorine.
  3. CIt has no effect on the electron gain enthalpy of these elements.
  4. DIt decreases the electron gain enthalpy of sulfur and chlorine.

Correct answer

B. It decreases the electron gain enthalpy of oxygen and fluorine.

Step-by-step solution

Electron-electron repulsion makes the electron gain enthalpy of oxygen and fluorine less negative compared to sulfur and chlorine because the added electron goes to a smaller quantum level and suffers significant repulsion from other electrons.
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