What is chemical properties?
A chemical property is a feature of a substance that may be seen when involved in a chemical reaction.
(i) Valence electrons:
Sodium valence shell
Metal's atoms normally have one, two, or three electrons in their outermost (valence) shell.
(ii) Formation of ions:
Sodium (positive) ion formation
Metals are electropositive as they lose electrons to produce positive ions.
(iii) Discharge of ions:
Electrolysis ions discharging
Metals are releases ions at the cathode during the electrolysis of their compounds.
Vapour state monoatomic molecule
Metal molecules in the vapour state are generally monoatomic.
(v) Nature of oxides:
Metal oxides are usually basic (alkaline) in nature.