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

2 answers

You can look these up on www.webelements.com
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-