Periodic property | In a period from left to right | In a group from top to bottom |
---|---|---|
Ionisation energy | Increase | Decrease |
Electron affinity | Increase | Decrease |
Electronegativity | Increase | Decrease |
Non-metallic character | Increase | Decrease |
Oxidising character | Increase | Decrease |
Acidic nature of oxides | Increase | Decrease |
Atomic size | Decrease | Increase |
Electropositivity | Decrease | Increase |
Metallic character | Decrease | Increase |
Basic nature of oxides | Decrease | Increase |