12. think and discuss: what is the relationship between electron affinity and atomic radius? why do you…

Brief Explanations:

Electron - affinity is the energy change when an electron is added to a neutral atom. As atomic radius increases, the outermost electrons are farther from the nucleus. There is less attraction for an added electron, so electron - affinity generally decreases. The nucleus has a weaker pull on the added electron due to the increased distance and shielding effect of inner - shell electrons.

Answer:

As atomic radius increases, electron - affinity generally decreases. This occurs because with a larger atomic radius, the nucleus has a weaker attraction for an added electron due to increased distance and electron - shielding effects.