Which part of the atom contains protons, electrons, neutrons?

An atom is a microscopic part of a substance that is a carrier of its properties. It consists of:

kernels;
an electron cloud (electron);
neutron.

The nucleus of an atom includes: protons and neutrons. Protons have different numbers (from one to several dozen). The atomic nucleus has a small radius (less than the radius of an atom by a factor of 100 thousand) and an extremely high density. We also note that the nucleus and electrons have diametrically opposite charges.

An electron is a part of a substance (minimum size) that has a negative electric charge of the coulomb, which is taken as elementary. Electrons are located in electron shells and revolve around the nucleus.

A proton is an elementary particle with a stable structure, which has a single positive charge and a mass greater than the mass of an electron (1836 times). Protons have a number equal to Z.

A neutron is an elementary particle that has no electric charge, with an atomic mass close to a proton.

Protons and neutrons are located in the atomic nucleus and are called a nucleon.