# Nuclear density

1. Feb 11, 2006

### kidia

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. Feb 11, 2006

### PPonte

At standard conditions for temperature and pressure one mole of any gas occupies 22.4 dm^3.

3. Feb 11, 2006

### Astronuc

Staff Emeritus
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.

4. Feb 11, 2006

### kidia

Thanx very much all I have got u.

5. Feb 11, 2006

### PPonte

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?

6. Feb 11, 2006

### Meir Achuz

If you do mean density of the O NUCLEUS, it is a completely different thing.

7. Feb 11, 2006

### Astronuc

Staff Emeritus
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.