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Electron affinity (ea)

Ease in which


E (g) + e- ➡️ E- (g)


Increases from left to right on PT

1st ionization energy


(IE1)

Energy to remove an e- in a gaseous state


E(g) ➡️ E+ (g) + e-

Electronegativity (EN)

The ability of an atom in a molecule to attract e- to itself


➡️⬆️