# What are some of the most dense materials

## What is the densest material on earth - definition

### Density of nuclear matter

The core density is the density of the atomic nucleus. It is the ratio of mass per unit volume within the core. Since the atomic nucleus carries most of the atomic mass and the atomic nucleus is very small compared to the entire atom, the nucleus density is very high.

The core density for a typical core can be roughly calculated from the size of the core and its mass.Typical core radii are on the order of10 – 14 m . Assuming a spherical shape, core radii can be calculated using the following formula:

r = r0 . A.1/3

where r0 = 1,2 × 10 –15 m = 1.2 sc

For example there isnatural uranium mainly from isotope238 U (99.28%), therefore the atomic mass of the uranium element is close to the atomic mass of238 U isotope (238.03u). Its radius of this core will be:

r = r0 . A.1/3 = 7.44 sc.

Assuming it is spherical, then its volume is:

V = 4πr3 / 3 = 1.73 x 10-42 m3 .

The usual definition of the core density gives for its density:

ρcore = m / V = ​​238 × 1.66 × 10–27 / (1,73 × 10 –42 ) = 2,3 × 10 17 kg / m3 .

Thus the density of core material is more than 2.1014- times higher than that of water. It's an immense density. The descriptive termCore density is also applied to situations in which similarly high densities occur, for example within neutron stars. Such immense densities can also be found in neutron stars.