IPA: /ˈaɪ.ɒn/
KK: /aɪən/
A particle that has an electric charge because it has gained or lost electrons.
In a battery, ions move between the electrodes to create electricity.
Ion → The word 'ion' comes from the Greek 'ion' (ἰόν), which is the present participle of 'ienai' (ἰέναι), meaning to go or to travel. An ion is a particle that has moved or traveled by gaining or losing electrons, thus acquiring a charge.
Think of 'ion' as something that 'goes' or 'travels' due to its charge — that's why an ion is a charged particle.