- Electronic Configuration
- Atomic Radii
- Ionization Enthalpy
- Physical Properties
- Chemical Properties - Oxidation state and trends in chemical reactivity ((i) Reactivity towards air, (ii) Reactivity towards acids and alkalies, (iii) Reactivity towards halogens)
In some of the reactions thallium resembles aluminium, whereas in others it resembles with group I metals. Support this statement by giving some evidences.