Please stop giving out wrong information, and then closing post for no apparent reason, other than you don't like or agree with what is being written by the poster. OnlyMe, is correct in stating that all mass has volume and mass density. In fact the person that defined "Mass" Isasac Newton defined it that way. In the Principia Mathematica, written by Newton, he defines mass in terms of density, which naturally assumes a volume. Look it up!