Question
The correct order of electron affinity is
✓
Answer
d
On moving from left to right across a period, the electron affinity becomes more negative. On moving from top to bottom in a group, the electron affinity becomes less negative. Chlorine has more negative electron affinity than fluorine, Because adding an electron to fluorine ($2p$ orbital) causes greater repulsion than adding an electron to chlorine ($3p$ orbital) which is larger in size
On moving from left to right across a period, the electron affinity becomes more negative. On moving from top to bottom in a group, the electron affinity becomes less negative. Chlorine has more negative electron affinity than fluorine, Because adding an electron to fluorine ($2p$ orbital) causes greater repulsion than adding an electron to chlorine ($3p$ orbital) which is larger in size
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