Question

Rank the following elements by electron affinity, from most positive to most negative EA value.
Rank from most positive to most negative. To rank items as equivalent, overlap them.
argon,sodium,iodine,oxygen,phosphorus

Answer 1

You can look these up on www.webelements.com

Answer 2

Electron affinity is the ability or likelihood of an atom to attract an electron to itself.

Sodium>>>>Oxygen>>>Phosphorous>>Iodine>Argon
Electron affinity is indirectly proportional to # of valence e-