Answer
Please see the work below.
Work Step by Step
We know that group VIIA halogens is the main group with the most negative electron affinities. This group elements need one electron to complete their octet which they gain from other elements.
General Chemistry 10th Edition
by Ebbing, Darrell; Gammon, Steven D.
Published by
Cengage Learning
ISBN 10:
1-28505-137-8
ISBN 13:
978-1-28505-137-6
Chapter 8 - Electron Configurations and Periodicity - Questions and Problems - Page 329: 8.13
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