How we can know metal and non-metal

Physical Properties of MetalsSome of the physical properties of metals are listed below.\tShiny (lustrous) in nature\tMetal is a good conductor of electricity and heat\tDensity and melting point is high\tMouldable (Malleable)\tDuctile\tAt room temperature, it is in solid form except for mercury\tOpaqueChemical Properties of MetalsSome of the chemical properties of metals are listed below.\tEasily corrodible\tCan lose electrons\tForm basic oxides\tHave low electronegativities\tGood reducing agentsPhysical Properties of Non-metalsSome of the physical properties of non-metals are listed below.\tPoor conductors of electricity and heat\tNon-Ductile metals\tBrittle solids\tMaybe solids, liquids or gases at room temperature\tThese are not sonorous\tTransparentChemical Properties of Non-metalsSome of the chemical properties of non-metals are listed below.\tThe number of electrons in the outer shell is generally 4-8\tEasily gain or lose valence electrons\tForm acidic oxides whenever they come in contact with oxygen\tHigh electronegative elements\tGreat oxidizing agents
Metal release electron while non metal gain elactron