Question

How does electron affinity vary in a group and in a period?​

Answer 1

Answer:

Electron affinity generally increases across a period in the periodic table and sometimes decreases down a group. These trends are not necessarily universal. The chemical rationale for changes in electron affinity across the periodic table is the increased effective nuclear charge across a period and up a group.

please thanks me

Answer 2

Answer:

Electron affinity increases across a period in periodic table and sometimes decreases