Molar volume or Atomic volume is obtained by dividing the relative atomic mass of an element by it's density. It is thus a Volume, measured in cubic centimetres. Since atomic volume of an element depends upon the density, it also depends upon the phase, the allotrope and the temperature. It is here given for the same CRYSTALLINE state as shown in the 'TABLE' "CRYSTALLINE FORM" and where possible at room temperature (298K, or as indicated) Generally speaking, the transition metals have the smallest MOLAR VOLUME, whereas the Nobel gases (He, Ne, Ar etc) and the alkali metals (Li, Na, K etc) have the largest MOLAR VOLUMES, followed closely by the Halogens (F, Cl, Br etc) and the Group 2 metals (Be, Mg, Ca etc). The so-called rare earths or Lanthanides and Actinides have intermediate volumes.
Notice the high correlation between the COMPRESSIBILITY and the MOLAR VOLUME.
