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
Download our app
and get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*