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.
The nucleus of an atom contains protons and neutrons. Protons have a positive charge, while neutrons have no charge. The nucleus is the central core of an atom where most of its mass is concentrated.
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.
nucleus
The Nucleus. Which is inside the electron clouds.
The nucleus
The Nucleus.
the nucleus
It is the nucleus. It is the middle of the atom
The atomic nucleus is the part of the atom that contains protons and neutrons.
the denser part of an atom is the nucleus. about 99% of the mass of an atom is concentrated within the atom.