# What is an atom (or group of atoms) that has an electric charge other than zero, and is created when an atom or group of atoms) gains or loses electrons?

$\text{An ion?}$
And $\text{anions}$ can be formed by $\text{reduction}$, electron gain typically by non-metals the which have high nuclear charge. or by $\text{oxidation}$, electron loss typically by metals, whose valence electrons are removed from the nuclear core....