propttle="Helium"
var propnum=19
propnme = new Array(19)
propval = new Array(19)
propunt = new Array(19)
propnme[1]="Atomic number"
propval[1]="2"
propunt[1]=""
propnme[2]="Mass number"
propval[2]="4"
propunt[2]=""
propnme[3]="Atomic / Molecular Weight"
propval[3]="4.002602"
propunt[3]="gmol<sup>-1</sup>"
propnme[4]="Density"
propval[4]="0.166"
propunt[4]="kgm<sup>-3</sup>"
propnme[5]="Lattice constant"
propval[5]="356"
propunt[5]="fm"
propnme[6]="Melting Point "
propval[6]="3.5"
propunt[6]="K"
propnme[7]="Boiling Point "
propval[7]="4.22"
propunt[7]="K"
propnme[8]="Specific heat capacity"
propval[8]="0.00519"
propunt[8]="Jkg<sup>-1</sup>K<sup>-1</sup>"
propnme[9]="Latent heat of evaporation"
propval[9]="25000"
propunt[9]="Jkg<sup>-1</sup>"
propnme[10]="Ratio of Specific Heats"
propval[10]="1.667"
propunt[10]=""
propnme[11]="Thermal conductivity "
propval[11]="0.1415"
propunt[11]="Wm<sup>-1</sup>K<sup>-1</sup>"
propnme[12]="Refractive index"
propval[12]="1.000036"
propunt[12]="at 589.3nm 101.3kPa 0°C"
propnme[13]="Velocity of sound"
propval[13]="972.5ms<sup>-1</sup> @ 0°C"
propunt[13]="ms<sup>-1</sup>"
propnme[14]="Viscosity"
propval[14]="0.0000186"
propunt[14]="Nsm<sup>-2</sup>"
propnme[15]="Kinematic Viscosity"
propval[15]="1.12048192771084E-04"
propunt[15]="m<sup>2</sup>s<sup>-1</sup>"
propnme[16]="Critical Temperature"
propval[16]="5.3"
propunt[16]="K"
propnme[17]="Critical Pressure"
propval[17]="230000"
propunt[17]="Pa"
propnme[18]="Critical Volume"
propval[18]="0.000058"
propunt[18]="m<sup>3</sup>mol<sup>-1</sup>"
propnme[19]="de Broglie wavelength"
propval[19]="0.000000000081"
propunt[19]="m"