Periodic Trends Ionic/Atomic Radius Decreases (Size of atom) EI Increases (Ionization Energy – Energy needed to remove e from atom) Increases EA Increases EN Increases (F) (e- Affinity – Energy change when gains e- (Electronegativity – ability to gain e- and bond) and forms ion) Decreases Decreases Decreases (Fr) Atomic Mass/Z Increases Increases Metal Properties Decreases (M  Semi  NM) Increases Nuclear Charge Increases Increase