Electrically charged atom or group of atoms formed by the loss or gain of electrons are?

Electrical  charged atom or group  of atoms formed  by lose or gain  of  electrons are  ions

Explanation

Ions   are formed  when atom gain or lose  electron.  

They are two  type  of  ion that is cation  and  anion.

Cation  are positively charged ion   and are  formed when atom loses  one or more electrons. for example Na+  formed  when Na atom  loses 1 electron.

Anion  are negatively charged  ion and are formed  when atom  gain  one or more electrons. for example Cl- is formed when Cl atom gain 1 electron.