The nucleolus.
The sum of all Protons and Neutrons.
Nearly all of an atom and mass is made up of protons and neutrons.
the nucleus
Nearly all of an atom and mass is made up of protons and neutrons.
This would be the NUCLEUS.
The nucleus is the part of the atom made up of protons and neutrons, and it contains nearly all of the atom's mass. Electrons, which have much lesser mass, orbit around the nucleus.
The nucleolus.
An atom is comprised of protons, neutrons, and electrons. The electrons take up the most space as they orbit the nucleus. But nearly all of the mass of the atom is found in the nucleus of the protons and neutrons.
Most of an atom's mass is concentrated in the nucleus, which is made up of protons and neutrons. While electrons contribute to the atom's overall structure, their mass is negligible compared to that of the nucleus. Thus, the nucleus is responsible for nearly all of the atom's mass.
Nearly all the mass is in the nucleus; however, the bulk of an atom's volume is empty space.
The nucleus makes up nearly all of the mass of an atom, with over 99% of its mass concentrated in the nucleus. Within the nucleus, most of the mass is found in the protons and neutrons, while the electrons surrounding the nucleus contribute very little to the overall mass.
The nucleus is the part of an atom that contains practically all its mass. In the nucleus, you can find the proton and neutron. The number of electrons, which move about the nucleus, is equal to the number of protons.