Charge per Unit Mass of lons Charge to mass ratio of ions:current which passes through circuit divided by mass gained on electrode. Ammeter Faraday (1830): discovered this phenomenon and determined the charge to mass ratio of ions M+ M+ M+ A十 -11Faraday (1830): discovered this phenomenon and determined the charge to mass ratio of ions Charge per Unit Mass of Ions M+ M+ M+ M+ Charge to mass ratio of ions: current which passes through circuit divided by mass gained on electrode. Ammeter I-11