Question

why do halogen elements have particularly large negative electron affinities? they are the most reactive elements they have unstable outer electron configurations adding an electron completes their noble gas electron configuration they have the most protons in their nucleus when an electron is added to a neutral atom, what typically happens to the energy? energy is absorbed energy remains constant energy is released energy becomes unpredictable

Explanation:

Halogen elements have large negative electron - affinities because adding an electron completes their noble gas electron configuration, which is a very stable state. When an electron is added to a neutral atom, energy is typically released as the atom moves to a more stable state.

Answer:

For the first question: Adding an electron completes their noble gas electron configuration.
For the second question: Energy is released.