Questions
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?
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a
Al < Ca < O < C < F
b
Al < O < C < Ca < F
c
C < F < O
d
Ca
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Correct option is D
Electron gain enthalpy becomes less negative from top of bottom in a group while it becomes more negative from left to right within a period.
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