Subatomic Particles
Electrons
Same as atomic number (except if it is an
isotope)
Protons
Atomic number
Neutrons
Atomic mass – atomic number
(Note: round the atomic mass to the
nearest whole number)
Bohr Model Shell Capacities
Shell # (inner to outer) Electron capacity
#1
2
#2
8
#3
8
Located in electron shells
Nucleus
Nucleus