Charged species are formed by loss (or) gain of electrons are known as ___

Ions: The charged species which are formed loss or gain of electrons are known as ions.$Na\Rightarrow \underset{\left(cation\right)}{N{a}^{+}}+1e^{-}$

$F+e^{-}\Rightarrow \underset{\left(anion\right)}{F^{-}}$