Of common gases only deuterium, helium and neon have thermal conductivities of the same order of magnitude as hydrogen and even those gases have {HEAD ~ thermal conductivities} far lower than {TAIL ~ hydrogen} 
Of common gases only deuterium , helium and neon have thermal conductivities of the same order of magnitude as hydrogen and even those gases have { HEAD ~ thermal conductivities } far lower than { TAIL ~ hydrogen }
OTH 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 REL REL TAIL TAIL TAIL TAIL TAIL