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Question: Answered & Verified by Expert
Which one of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for C, Ca, Al, F and O?
ChemistryClassification of Elements and Periodicity in PropertiesNEET
Options:
  • A Al < Ca < O < C < F
  • B Al < O < C < Ca < F
  • C C < F < O Al < Ca
  • D Ca < Al < C < O < F
Solution:
1730 Upvotes Verified Answer
The correct answer is: Ca < Al < C < O < F
Electron gain enthalpy becomes less negative from top to bottom in a group while it becomes more negative from left to right within a period.
Ca < Al < C < O < F

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