Electron Affinity vs Ionization Energy

[Lauren Ton 4B]

If the trends for electron affinity and ionization energy are the same (as in both decrease down a group and increase across a period), how do we differentiate when to use each and when do we use ionization energy to describe an atom vs electron affinity?

[Chem_Mod]

Use them in the context of the topic.
For example:
Li usually has a +1 oxidation state due to its low ionization energy.
Cl usually has a -1 oxidation state due to its high electron affinity.

[504594108]

What exactly is the difference between ionization energy and electron affinity?

[Julia Kim 1D]

Ionization energy is the energy required to remove an electron from an atom while electron affinity is how easily an atom will accept an electron into its shells.