Chemistry - PERIODIC TABLE Question with Solution | TestHub

Electron affinity generally increases across a period and decreases down a group. Chlorine (Cl) is in the same period as sulfur (S) but further to the right, and it has a higher effective nuclear charge, leading to a greater electron affinity. Oxygen (O), Selenium (Se), and Tellurium (Te) are in the same group as Sulfur (S) or in groups where electron affinity is less than S.

Concepts: Electron affinity trend, periodic table position.

The final answer is $\boxed{D}$