The radius size R of nucleus is related to its mass number A asR = R0A1/3 where R0 = 1.1 × 10–15 mIf m is the average mass of a nucleon then mass of nucleus = mA where A is mass number Volume of nucleus∴ Density of nucleus Clearly nuclear density ρN is independent of mass number A.

The outermost regions of the atom are called electron shells and contain the electrons (negatively charged). Structure of an atom: Elements, such as helium, depicted here, are made up of atoms. Atoms are made up of protons and neutrons located within the nucleus, with electrons in orbitals surrounding the nucleus.

Nuclei are very dense and extremely small, they contains more that 99.9% of the mass of an atom and are ten thousand times smaller than an atom! The nucleus is a collection of particles called protons, which are positively charged, and neutrons, which are electrically neutral.

The usual definition of nuclear density gives for its density: ρnucleus = m / V = 238 x 1.66 x 10-27 / (1.73 x 10-42) = 2.3 x 1017 kg/m3.

Nuclear density is the density of the nucleus of an atom. It is the ratio of mass per unit volume inside the nucleus. Since atomic nucleus carries most of atom’s mass and atomic nucleus is very small in comparison to entire atom, the nuclear density is very high.

And every element has a unique atomic number which is equal to number of protons, which leads to the fact that the mass of nucleus will be different and since different mass results in different density hence nucleus of all elements does not have same density. So the density of nucleus more than that of the atom.

The nucleus is a small, dense region at the center of the atom. It consists of positive protons and neutral neutrons, so it has an overall positive charge. The nucleus is just a tiny part of the atom, but it contains virtually all of the atom’s mass.

The atom consists of a tiny nucleus surrounded by moving electrons. The nucleus contains protons, which have a positive charge equal in magnitude to the electron’s negative charge. The nucleus may also contain neutrons, which have virtually the same mass but no charge.

Nuclei readily capture neutrons, which, unlike protons or alpha particles, are not repelled from the nucleus by a positive charge. When a neutron is captured, the new nucleus has one higher unit of atomic mass.

The nucleus has 2 primary functions: It is responsible for storing the cell’s hereditary material or the DNA. It is responsible for coordinating many of the important cellular activities such as protein synthesis, cell division, growth and a host of other important functions.