The protons and neutrons, but not the electrons since they are about thousand times lighter than protons and neutrons.
Protons and neutrons lie in the atom's nucleus, accounting for almost 100% of the atom's weight. The center of an atom is called it's nucleus.
Alpha particles are emitted from the atom taking with it 2 protons and (I am pretty sure) two neutrons. This will change the atomic number of the atom and the atomic weight.
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Virtually all of the mass of an atom is carried by the proton and the neutron. The electron has very, very little mass relative to these two particles.
In an atom of antimatter, that would be true, in an atom of matter that would be false.
The 3 Particles in a atom are * Proton * Neutron * Electron
Atoms contain three different sub-atomic particles. Protons, which are particles with a positive charge, and neutrons, particles with a neutral charge are found in the nucleus at the center of the atom. Surrounding the nucleus are electrons, particles that have negative charge.
thesubatomic particles are the particles smaller than an atom
The subatomic particles that contribute most almost no weight to an atom are electrons at various energy levels. Isotopes of the same element differ from each other only by the number of neutrons.
These subatomic particles are generally considered the building blocks of atoms. The electron is an elementary particle, while the proton and neutron are composite particles that are made up of quarks. Links can be found below for more information.
Protons are the only positively charged particles in an atom.
The atom contain subatomic particles as neutron, proton, electron.