Question

Which of the following sequences correctly represents the electron affinity of the halogens?

Q: Answer-Which of the following sequences correctly represents the electron affinity of the halogens?

Electron affinity generally increases across a period and decreases down a group due to atomic size and electron-electron repulsion in smaller atoms. Among halogens, chlorine has a higher electron affinity than fluorine due to its larger size allowing easier addition of an electron, making the order I Br Cl F.