Atoms consist of a nucleus containing protons and neutrons, surrounded by electrons in shells The numbers of subatomic particles in an atom can be calculated from itsAug 15, · The Bohr model shows the three basic subatomic particles in a simple manner Most of an atom's mass is in the nucleus— a small, dense area at the center of every atom, composed of nucleons Nucleons include protons and neutrons All the positive charge of an atom is contained in the nucleus, and originates from the protonsJun 30, 08 · 5 Atoms Molecules Ions Particle Mass (kg) Mass (amu) Charge Electron x 10 31 1 Proton x 10 27 1 Neutron x 10 27 0 Most of the mass in an atom is in the nucleus Subatomic Particles 6
Thomson S Atomic Model Ck 12 Foundation
