An atom contains protons, neutrons and electrons.
The Table shows information about these particles.
Table
| Particle | Relative mass | Relative charge | Where the particle is found |
|---|---|---|---|
| proton | 1 | in the nucleus | |
| neutron | 0 | in the nucleus | |
| electron | 11840\displaystyle \frac{1}{1840}18401 | -1 |
Complete the Table.
State the overall charge of an atom.
Give the name of the particle that has the same relative mass as an electron but a relative charge of +1.
State where almost all of the mass of an atom is found.