Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Nuclear density

  1. Feb 11, 2006 #1
    Calculate the nuclear density of Oxygen element.As I know the molar mass number is 15.9994 and the density is mass/volume how can I get the volume inorder to calculate the density?
  2. jcsd
  3. Feb 11, 2006 #2
    At standard conditions for temperature and pressure one mole of any gas occupies 22.4 dm^3.
  4. Feb 11, 2006 #3


    User Avatar
    Staff Emeritus
    Science Advisor

    Are you trying to calculate the atomic density of oxygen gas? If so, remember that oxygen is diatomic.

    Think of Avogadro's/Loschmidt's number and the fact that a mole of any gas occupies 22.4 l at STP.

    If however, one is trying to determine the density of the nucleus or the density of the atom itself, those are quite different. Also, atomic densities of solids, liquids and gases are temperature dependent.
  5. Feb 11, 2006 #4
    Thanx very much all I have got u.
  6. Feb 11, 2006 #5
    Astronuc, you called to the number of particles of one mole Avogadro's/Loschmidt's number. I just knew it by Avogadro's number and did a search in wikipedia. It says:

    So, do you know why is it generally called Avogadro's number if it was Loschmidt who estimated it?
  7. Feb 11, 2006 #6

    Meir Achuz

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    If you do mean density of the O NUCLEUS, it is a completely different thing.
  8. Feb 11, 2006 #7


    User Avatar
    Staff Emeritus
    Science Advisor

    Well, I studied German in high school and unversity, and I worked on projects with German companies, so I learned that Avogadro's number is generally called Loschmidt's number or constant in Germany and parts of Europe, basically German-speaking countries. As to why, I am not sure.

    See also - http://gemini.tntech.edu/~tfurtsch/scihist/avogadro.htm [Broken]
    Last edited by a moderator: May 2, 2017
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook