State three differences between ‘X’ and ‘X1+’ i.e. an atom and an ion.

Question

State three differences between &#8216;X&#8217; and &#8216;X1+&#8217; i.e. an atom and an ion.

Flash Institute · Accepted Answer

Differences between &#8216;X&#8217; and &#8216;X1+ are :

Atoms – &#8216;X&#8217;
Ions – &#8216;X1+&#8216;

Electrically neutral particles
Electrically charged particles [cations, anions]

May or may not exist independently
Exist independently in solution

Outermost shell may or may not have duplet or octet.
Outermost shell have complete duplet or octet.