99.9% of the mass of an atom is located in the nucleus
It is the nucleus. Mass of electrons is too small
virtually all the mass in concentrated in the nucleus of the atom, as the electron's mass is so small, it is negligible.
in the nucleus of the atom
in the nucleus
in the nucleus of the atom
The nucleus.
The mass of an atom is concentrated in the nucleus (protons+neutrons).
The bulk of the mass of the atom is concenrated in the small, dense nucleus.
The mass of an atom is concentrated in the nucleus, which is made up of protons and neutrons.
The mass of an atom is concentrated in the nucleus. Protons are a part of the nucleus, but not the entire thing. Neutrons are also in the nucleus and have nearly the same mass as protons.
An atom's mass is concentrated in its nucleus, which is located in the center of the atom. Protons and neutrons within the nucleus are responsible for its mass; the electrons, which are located outside of the nucleus, don't contribute to the mass of the atom.
in the nucleus of the atom