Answer
Step-by-step explanation
Electron affinity is one of the periodic properties of elements in the periodic table. The electron affinity of an atom or molecule is the propensity for that particle to gain an electron.
There are general trends in electron affinity across and down the periodic table of elements. Electron affinity generally increases across a period in the periodic table and sometimes decreases down a group.
Therefore the EA ranking of the given elements from most positive to most negative are: