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