it only contains proton and neutron
An atom contains protons and neutrons in the nucleus (though Hydrogen does not have neutrons) and electrons orbiting the nucleus.
nucleus
It contains the nucleons (protons and neutrons)
The "dense" central portion of an atom is called the nucleus. The nucleus of an atom contains neutrons and protons.
The nucleus, made up of protons and neutrons, contains most of an atom's mass.
The nucleus
the nucleus
The Nucleus.
It is the nucleus. It is the middle of the atom
It contains protons and neutrons and no electrons.
The nucleus of an atom contains protons and neutrons. Different amount of neutrons- Isotopes. Different amount of protons- Different element.
The nucleus of an atom is the central part of an atom containing practically all the mass of the atom. The nucleus is composed from protons and neutrons.