Based upon the electron affinity trend, which group of atoms is most likely to acquire an additional electron?

Question

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The electron affinity trend shows that atoms that are closer to having a full outer shell of electrons (i.e. atoms that are closer to a noble gas configuration) have a higher electron affinity. Halogens, which are in Group 17, are only one electron away from a full outer shell and therefore have a high affinity for an additional electron.

Based Upon the Electron Affinity Trend, Which Group of Atoms