Neutrons (mass = 1 and charge = 0) and Protons (mass = 1 and charge = +1)
the nucleus is the center of an atom that contains the positively charged protons and the neutrally charged neutrons. It contains most of the mass of the atom.
The nucleus contains the mass.
That region is called the nucleus of the atom.
nutrons
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.
An atom contains protons and neutrons in the nucleus (though Hydrogen does not have neutrons) and electrons orbiting the nucleus.
The nucleus, made up of protons and neutrons, contains most of an atom's mass.
the nucleus is the center of an atom that contains the positively charged protons and the neutrally charged neutrons. It contains most of the mass of the atom.
the denser part of an atom is the nucleus. about 99% of the mass of an atom is concentrated within the atom.
The nucleus contains the mass.
The "dense" central portion of an atom is called the nucleus. The nucleus of an atom contains neutrons and protons.
It is the nucleus. It is the middle of the atom
The nucleus of a helium atom contains two protons and two neutrons.
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.
It contains protons and neutrons and no electrons.
the nucleus
The nucleus