In the reaction of Alkali metals with water,the products formed are- 2 metal ions,2OH ions and 2 hydrogen atoms. Please explain me the formation of ions and cations?

Since 2 hydrogen atoms combine to form a hydrogen molecule therefore, 2 water molecules dissosciate to give 2 hydrogen ions and 2 hydroxide ions

so the net reaction becomes

2M(s) + 2H₂O(l) ---> 2M⁺(aq) + 2OH^-(aq) + H₂(g)

2Na(s) + 2H₂O(l)---> 2NaOH(aq) + H₂(g)