Define electron affinity andalso describe its trend ingroups and perio

1.	Define electron affinity andalso describe its trend ingroups and period?
Answer» <html><body><p><strong>Answer:</strong></p><p>Electron affinity increases upward across <a href="https://interviewquestions.tuteehub.com/tag/periods-1151203" style="font-weight:bold;" target="_blank" title="Click to know more about PERIODS">PERIODS</a> of a periodic table for the groups and from left to right, because the electrons <a href="https://interviewquestions.tuteehub.com/tag/added-367625" style="font-weight:bold;" target="_blank" title="Click to know more about ADDED">ADDED</a> to the energy levels <a href="https://interviewquestions.tuteehub.com/tag/get-11812" style="font-weight:bold;" target="_blank" title="Click to know more about GET">GET</a> closer to the <a href="https://interviewquestions.tuteehub.com/tag/nucleus-18220" style="font-weight:bold;" target="_blank" title="Click to know more about NUCLEUS">NUCLEUS</a>, making the nucleus and its electrons more attractive.</p></body></html>

Define electron affinity andalso describe its trend ingroups and period?