What is the nucleus of an atom made of?

Answer 1

An atom consists of a heavy small nucleus in the center and electrons revolving around it. Nearly all mass is concentrated in the nucleus. The electrons are forming a cloud around the nucleus because they are moving with an enormous speed. Take an example of an atom of Carbon. It has 6 protons and 6 neutrons in the nucleus and 6 electrons revolving around it. Its mass is 12 atomic units and the it has a valency of 4.

The nucleus of carbon has a mass of 1.92x10^-26 Kg whereas the six electrons have a total mass of 9.11x10^-31 Kg. We can, in some cases ignore the mass of electros all together. On the other hand the size(radius) of the nucleus of carbon-12 is 2.7x 10^-15m and the size(radius) of an atom of C-12 is 1.7x10^-10m. The density i.e mass per unit volume of C-12 is 2.26x10^3 Kg/m^3 and the density of nucleus of C-12 is 1.7x10^17Kg/m^3.

Try calculating it by yourself. It is interesting.

Visualize if all the electrons were detached from the nucleus and we have a nuclear mass, how much heavy it will be?

Answer 2

Atomic nucleus is made up of neutrons ie chargeless particles and protons with positive charge on it. These are two main constituents. But these are held together so tight because of exchange of mesons in between them. So mesons too are there within the nucleus. Each neutron would split into a proton and an electron if such an opportunity occurs. Hence hidden electrons are there within each neutron. Generally energy has so many forms. Especially in case of nucleus it is apparent that energy is mostly seen as protons, neutrons and mesons.

Protons (they have a positive charge) and Neutrons (they have no charge);

This is true, except for the nucleus of Hydrogen which is only ONE proton, no neutrons in it; however Deuterium [Heavy Hydrogen] is a proton combined in the Atom's nucleus with a neutron and Tritium [Extra Heavy Hydrogen] is a proton combined in the Atom's nucleus with two neutrons.

Protons and neutrons and mesons.

Answer 3

Protons and Neutrons make up the nucleus of an atom.

Answer 4

An atom is made up of Protons Neutrons and Electrons.

In the nucleus (protons and neutrons)

in the shells (electrons)

Answer 5

Chromatin, divided into heterochromatin and euchromatin.

Answer 6

Protons and Neutrons surrounded by electrons

Answer 7

A nucleus always contains at least one proton and almost always also has one or more neutrons.

Answer 8

protons, neutrons, & electrons