1. Inside the atom
Nucleon - name used for a particle (proton or neutron) in the nucleus
| Charge/C | Charge relative to proton | Mass/kg | mass relative to proton | |
|---|---|---|---|---|
| Proton | +1.60 x 10^-19 | 1 | 1.67 x 10^-27 | 1 |
| Neutron | 0 | 0 | 1.67 x 10^-27 | 1 |
| Electron | 1.60 x 10^-19 | -1 | 9.11 x 10^-31 | 0.005 |
Specific charge = charge/mass
Atomic number = z
Nucleon number = A
Isotopes are atoms with the same number of protons but a different number on neutrons in the nucleus.