Question

which element would release the most energy while adding an electron to a neutral atom in the gas phase?
o na
o al
o br
o s

Explanation:

Electron - affinity is the energy change when an electron is added to a neutral atom in the gas phase. Halogens have high electron - affinities as they are one electron away from a stable noble - gas configuration. Bromine (Br) is a halogen, while sodium (Na) is an alkali metal, aluminum (Al) is a metal, and sulfur (S) is a non - metal but not a halogen. Halogens release a large amount of energy when gaining an electron.

Answer:

C. Br