Question

What is the trend in EA across 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.

Explanation:

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Answer 2

Electron affinity increases across a period.

Explanation:

• Across the periodic table, we can easily study the trend of EA.
• EA goes through various chemical changes across the table.
• It results in increased nuclear charge across the period that is up in the group.
• It develops a negatively charged ion when an electron is added to the neutral atom. This is known as electron affinity.
• The values for electron affinities are available for a few chemical elements as they are difficult to measure.
• Therefore, electron affinity increases across a period.