Explanations:
An ion is an atom or molecule that has one or more electric positive or negative electric charges.
Na+1 is a sodium ion carrying a positively charged particle. This ion is a monoatomic monocation that is obtained from sodium. The single positively charged ions show that the sodium atom contains one valence electron in its outermost shell and can easily donate this one electron to other elements. They are therefore called donors.
Cu2+ is an ion of a copper atom carrying a double positive charge While Cu2+ ion is known to be basic, Na+ ion is neither basic nor acidic.