As electrons flow through the external circuit, schematically indicated by reference numeral 26, {HEAD ~ alkali metal} 16 passes through electrolyte tube 14 in {TAIL ~ the form} of cations 
As electrons flow through the external circuit , schematically indicated by reference numeral 26 , { HEAD ~ alkali metal } 16 passes through electrolyte tube 14 in { TAIL ~ the form } of cations
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH