Question

Write about the factors that influence electron affinity.

Answer 1

Answer:

Various factors that affect electron affinity are atomic size, nuclear charge and the symmetry of the electronic configuration. Atomic size: With increase in the atomic size, the distance between the nucleus and the incoming electron also increases.

Explanation:

Answer 2

Answer

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Hint: Electron affinity depends on atomic size, nuclear charge and the symmetry of the electronic configuration.

Complete step by step answer:

Various factors that affect electron affinity are atomic size, nuclear charge and the symmetry of the electronic configuration.

Atomic size: With increase in the atomic size, the distance between the nucleus and the incoming electron also increases. The attraction between the nucleus and the incoming electron decreases. Due to this, the electron affinity will have smaller value. For example, potassium has higher atomic size than sodium. The electron affinity of potassium is lower than that of sodium. Thus, in the group of alkali metals, on moving from top to bottom, with increase in the atomic size, the electron affinity values decreases. Similar is the trend observed for halogens.

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